31123023320001 has 4 divisors (see below), whose sum is σ = 41497364426672. Its totient is φ = 20748682213332.

The previous prime is 31123023319979. The next prime is 31123023320003. The reversal of 31123023320001 is 10002332032113.

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 not a de Polignac number, because 31123023320001 - 2²² = 31123019125697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31123023320001.

It is not an unprimeable number, because it can be changed into a prime (31123023320003) 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, 5187170553331 + ... + 5187170553336.

It is an arithmetic number, because the mean of its divisors is an integer number (10374341106668).

Almost surely, 2^{31123023320001} is an apocalyptic number.

It is an amenable number.

31123023320001 is a deficient number, since it is larger than the sum of its proper divisors (10374341106671).

31123023320001 is a wasteful number, since it uses less digits than its factorization.

31123023320001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10374341106670.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31123023320001 its reverse (10002332032113), we get a palindrome (41125355352114).

The spelling of 31123023320001 in words is "thirty-one trillion, one hundred twenty-three billion, twenty-three million, three hundred twenty thousand, one".