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BaseRepresentation
bin10110101111100101…
…01001001101011111
31011111221212010012221
423113302221031133
5200001314441111
65335341210211
7611403640231
oct132762511537
934457763187
1012210312031
1151a6448175
122449260967
1311c78bc708
1483b926251
154b6e65371
hex2d7ca935f

12210312031 has 8 divisors (see below), whose sum is σ = 12491377920. Its totient is φ = 11930132568.

The previous prime is 12210312029. The next prime is 12210312041. The reversal of 12210312031 is 13021301221.

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 12210312031 - 21 = 12210312029 is a prime.

It is a super-2 number, since 2×122103120312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210311996 and 12210312014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210312001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193701 + ... + 248878.

It is an arithmetic number, because the mean of its divisors is an integer number (1561422240).

Almost surely, 212210312031 is an apocalyptic number.

12210312031 is a deficient number, since it is larger than the sum of its proper divisors (281065889).

12210312031 is an equidigital number, since it uses as much as digits as its factorization.

12210312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443213.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12210312031 its reverse (13021301221), we get a palindrome (25231613252).

The spelling of 12210312031 in words is "twelve billion, two hundred ten million, three hundred twelve thousand, thirty-one".