31021203404121 has 32 divisors (see below), whose sum is σ = 48278626971648. Its totient is φ = 17348357347200.

The previous prime is 31021203404053. The next prime is 31021203404131. The reversal of 31021203404121 is 12140430212013.

It is not a de Polignac number, because 31021203404121 - 2²³ = 31021195015513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31021203404091 and 31021203404100.

It is not an unprimeable number, because it can be changed into a prime (31021203404131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18749946 + ... + 20337228.

It is an arithmetic number, because the mean of its divisors is an integer number (1508707092864).

Almost surely, 2^{31021203404121} is an apocalyptic number.

It is an amenable number.

31021203404121 is a deficient number, since it is larger than the sum of its proper divisors (17257423567527).

31021203404121 is a wasteful number, since it uses less digits than its factorization.

31021203404121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607141.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 31021203404121 its reverse (12140430212013), we get a palindrome (43161633616134).

The spelling of 31021203404121 in words is "thirty-one trillion, twenty-one billion, two hundred three million, four hundred four thousand, one hundred twenty-one".