31121300033421 has 16 divisors (see below), whose sum is σ = 44911552694400. Its totient is φ = 19055330205120.

The previous prime is 31121300033413. The next prime is 31121300033489. The reversal of 31121300033421 is 12433000312113.

It is not a de Polignac number, because 31121300033421 - 2³ = 31121300033413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31121300033391 and 31121300033400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121300033401) 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, 2004972270 + ... + 2004987791.

It is an arithmetic number, because the mean of its divisors is an integer number (2806972043400).

Almost surely, 2^{31121300033421} is an apocalyptic number.

It is an amenable number.

31121300033421 is a deficient number, since it is larger than the sum of its proper divisors (13790252660979).

31121300033421 is a wasteful number, since it uses less digits than its factorization.

31121300033421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009960276.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31121300033421 its reverse (12433000312113), we get a palindrome (43554300345534).

The spelling of 31121300033421 in words is "thirty-one trillion, one hundred twenty-one billion, three hundred million, thirty-three thousand, four hundred twenty-one".