31212023131001 has 4 divisors (see below), whose sum is σ = 31351987360512. Its totient is φ = 31072058901492.

The previous prime is 31212023130907. The next prime is 31212023131007. The reversal of 31212023131001 is 10013132021213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212023131001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212023131007) 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, 69982114421 + ... + 69982114866.

It is an arithmetic number, because the mean of its divisors is an integer number (7837996840128).

Almost surely, 2^{31212023131001} is an apocalyptic number.

It is an amenable number.

31212023131001 is a deficient number, since it is larger than the sum of its proper divisors (139964229511).

31212023131001 is a wasteful number, since it uses less digits than its factorization.

31212023131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139964229510.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31212023131001 its reverse (10013132021213), we get a palindrome (41225155152214).

The spelling of 31212023131001 in words is "thirty-one trillion, two hundred twelve billion, twenty-three million, one hundred thirty-one thousand, one".