31404420221121 has 12 divisors (see below), whose sum is σ = 45785883688272. Its totient is φ = 20740613977176.

The previous prime is 31404420221077. The next prime is 31404420221149. The reversal of 31404420221121 is 12112202440413.

31404420221121 is a `hidden beast` number, since 3 + 1 + 4 + 0 + 4 + 420 + 2 + 211 + 21 = 666.

It is not a de Polignac number, because 31404420221121 - 2⁹ = 31404420220609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31404420221171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16305513171 + ... + 16305515096.

It is an arithmetic number, because the mean of its divisors is an integer number (3815490307356).

Almost surely, 2^{31404420221121} is an apocalyptic number.

It is an amenable number.

31404420221121 is a deficient number, since it is larger than the sum of its proper divisors (14381463467151).

31404420221121 is a wasteful number, since it uses less digits than its factorization.

31404420221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32611028380 (or 32611028377 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 31404420221121 its reverse (12112202440413), we get a palindrome (43516622661534).

The spelling of 31404420221121 in words is "thirty-one trillion, four hundred four billion, four hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".