312010111021 has 16 divisors (see below), whose sum is σ = 368247193600. Its totient is φ = 258696653040.

The previous prime is 312010111019. The next prime is 312010111079. The reversal of 312010111021 is 120111010213.

It is a happy number.

It is not a de Polignac number, because 312010111021 - 2¹ = 312010111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312010110992 and 312010111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312010111001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181930 + ... + 810628.

It is an arithmetic number, because the mean of its divisors is an integer number (23015449600).

Almost surely, 2^312010111021 is an apocalyptic number.

312010111021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

312010111021 is a deficient number, since it is larger than the sum of its proper divisors (56237082579).

312010111021 is a wasteful number, since it uses less digits than its factorization.

312010111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631024.

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

Adding to 312010111021 its reverse (120111010213), we get a palindrome (432121121234).

The spelling of 312010111021 in words is "three hundred twelve billion, ten million, one hundred eleven thousand, twenty-one".