31222041021 has 12 divisors (see below), whose sum is σ = 45442768800. Its totient is φ = 20655802440.

The previous prime is 31222041017. The next prime is 31222041091. The reversal of 31222041021 is 12014022213.

It is a happy number.

31222041021 is a `hidden beast` number, since 3 + 12 + 220 + 410 + 21 = 666.

It is not a de Polignac number, because 31222041021 - 2² = 31222041017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31222040985 and 31222041003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222041091) 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, 13239721 + ... + 13242078.

It is an arithmetic number, because the mean of its divisors is an integer number (3786897400).

Almost surely, 2^31222041021 is an apocalyptic number.

It is an amenable number.

31222041021 is a deficient number, since it is larger than the sum of its proper divisors (14220727779).

31222041021 is a wasteful number, since it uses less digits than its factorization.

31222041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26481936 (or 26481933 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31222041021 its reverse (12014022213), we get a palindrome (43236063234).

The spelling of 31222041021 in words is "thirty-one billion, two hundred twenty-two million, forty-one thousand, twenty-one".