31023003212021 has 4 divisors (see below), whose sum is σ = 32092761943500. Its totient is φ = 29953244480544.

The previous prime is 31023003211997. The next prime is 31023003212023. The reversal of 31023003212021 is 12021230032013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7964327428996 + 23058675783025 = 2822114^2 + 4801945^2 .

It is a cyclic number.

It is not a de Polignac number, because 31023003212021 - 2³⁸ = 30748125305077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023003211984 and 31023003212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023003212023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534879365696 + ... + 534879365753.

It is an arithmetic number, because the mean of its divisors is an integer number (8023190485875).

Almost surely, 2^{31023003212021} is an apocalyptic number.

It is an amenable number.

31023003212021 is a deficient number, since it is larger than the sum of its proper divisors (1069758731479).

31023003212021 is a wasteful number, since it uses less digits than its factorization.

31023003212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069758731478.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31023003212021 its reverse (12021230032013), we get a palindrome (43044233244034).

The spelling of 31023003212021 in words is "thirty-one trillion, twenty-three billion, three million, two hundred twelve thousand, twenty-one".