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10212111031 = 12647807473
BaseRepresentation
bin10011000001011000…
…00111001010110111
3222100200212222202111
421200230013022313
5131403300023111
64405200551451
7511031340313
oct114054071267
928320788674
1010212111031
11437051a191
121b90022587
13c69925165
146cc3b8b43
153eb80aa21
hex260b072b7

10212111031 has 4 divisors (see below), whose sum is σ = 10212931152. Its totient is φ = 10211290912.

The previous prime is 10212110977. The next prime is 10212111053. The reversal of 10212111031 is 13011121201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10212111031 - 27 = 10212110903 is a prime.

It is a super-2 number, since 2×102121110312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212111061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391090 + ... + 416383.

It is an arithmetic number, because the mean of its divisors is an integer number (2553232788).

Almost surely, 210212111031 is an apocalyptic number.

10212111031 is a deficient number, since it is larger than the sum of its proper divisors (820121).

10212111031 is an equidigital number, since it uses as much as digits as its factorization.

10212111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820120.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10212111031 its reverse (13011121201), we get a palindrome (23223232232).

The spelling of 10212111031 in words is "ten billion, two hundred twelve million, one hundred eleven thousand, thirty-one".

Divisors: 1 12647 807473 10212111031