21312101033031 has 64 divisors (see below), whose sum is σ = 30397867729920. Its totient is φ = 13235067740160.

The previous prime is 21312101033011. The next prime is 21312101033033. The reversal of 21312101033031 is 13033010121312.

It is a happy number.

It is not a de Polignac number, because 21312101033031 - 2⁶ = 21312101032967 is a prime.

It is a super-2 number, since 2×21312101033031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312101032989 and 21312101033007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312101033033) 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 63 ways as a sum of consecutive naturals, for example, 6421239990 + ... + 6421243308.

It is an arithmetic number, because the mean of its divisors is an integer number (474966683280).

Almost surely, 2^{21312101033031} is an apocalyptic number.

21312101033031 is a deficient number, since it is larger than the sum of its proper divisors (9085766696889).

21312101033031 is a wasteful number, since it uses less digits than its factorization.

21312101033031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5944.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21312101033031 its reverse (13033010121312), we get a palindrome (34345111154343).

The spelling of 21312101033031 in words is "twenty-one trillion, three hundred twelve billion, one hundred one million, thirty-three thousand, thirty-one".