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12013230031 = 111429764249
BaseRepresentation
bin10110011000000101…
…10101011111001111
31011000020000022112121
423030002311133033
5144100341330111
65304021113411
7603461525155
oct131402653717
934006008477
1012013230031
115105178590
1223b3258867
131195b1764a
1481d6a33d5
154a49d5871
hex2cc0b57cf

12013230031 has 8 divisors (see below), whose sum is σ = 13114530000. Its totient is φ = 10913461440.

The previous prime is 12013230007. The next prime is 12013230059. The reversal of 12013230031 is 13003231021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12013230031 - 25 = 12013229999 is a prime.

It is a super-2 number, since 2×120132300312 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12013229987 and 12013230014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013230431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366406 + ... + 397843.

It is an arithmetic number, because the mean of its divisors is an integer number (1639316250).

Almost surely, 212013230031 is an apocalyptic number.

12013230031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12013230031 is a deficient number, since it is larger than the sum of its proper divisors (1101299969).

12013230031 is a wasteful number, since it uses less digits than its factorization.

12013230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765689.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 12013230031 its reverse (13003231021), we get a palindrome (25016461052).

The spelling of 12013230031 in words is "twelve billion, thirteen million, two hundred thirty thousand, thirty-one".

Divisors: 1 11 1429 15719 764249 8406739 1092111821 12013230031