3131123003021 has 8 divisors (see below), whose sum is σ = 3371996507544. Its totient is φ = 2890252054080.

The previous prime is 3131123003017. The next prime is 3131123003033. The reversal of 3131123003021 is 1203003211313.

It can be written as a sum of positive squares in 4 ways, for example, as 23412366121 + 3107710636900 = 153011^2 + 1762870^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3131123003021 - 2² = 3131123003017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131123002984 and 3131123003002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131123003081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2463911 + ... + 3511851.

It is an arithmetic number, because the mean of its divisors is an integer number (421499563443).

Almost surely, 2^{3131123003021} is an apocalyptic number.

It is an amenable number.

3131123003021 is a deficient number, since it is larger than the sum of its proper divisors (240873504523).

3131123003021 is a wasteful number, since it uses less digits than its factorization.

3131123003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277791.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 3131123003021 its reverse (1203003211313), we get a palindrome (4334126214334).

It can be divided in two parts, 313112 and 3003021, that added together give a palindrome (3316133).

The spelling of 3131123003021 in words is "three trillion, one hundred thirty-one billion, one hundred twenty-three million, three thousand, twenty-one".