31213003230321 has 16 divisors (see below), whose sum is σ = 45439174646208. Its totient is φ = 18900953873600.

The previous prime is 31213003230307. The next prime is 31213003230347. The reversal of 31213003230321 is 12303230031213.

It is a cyclic number.

It is not a de Polignac number, because 31213003230321 - 2⁹ = 31213003229809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31213003230291 and 31213003230300.

It is not an unprimeable number, because it can be changed into a prime (31213003210321) 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, 400404966 + ... + 400482911.

It is an arithmetic number, because the mean of its divisors is an integer number (2839948415388).

Almost surely, 2^{31213003230321} is an apocalyptic number.

It is an amenable number.

31213003230321 is a deficient number, since it is larger than the sum of its proper divisors (14226171415887).

31213003230321 is a wasteful number, since it uses less digits than its factorization.

31213003230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800889072.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31213003230321 its reverse (12303230031213), we get a palindrome (43516233261534).

The spelling of 31213003230321 in words is "thirty-one trillion, two hundred thirteen billion, three million, two hundred thirty thousand, three hundred twenty-one".