31102202121 has 16 divisors (see below), whose sum is σ = 41560044288. Its totient is φ = 20689632000.

The previous prime is 31102202113. The next prime is 31102202149. The reversal of 31102202121 is 12120220113.

It is not a de Polignac number, because 31102202121 - 2³ = 31102202113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31102202121.

It is not an unprimeable number, because it can be changed into a prime (31102202821) 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, 2866176 + ... + 2877006.

It is an arithmetic number, because the mean of its divisors is an integer number (2597502768).

Almost surely, 2^31102202121 is an apocalyptic number.

It is an amenable number.

31102202121 is a deficient number, since it is larger than the sum of its proper divisors (10457842167).

31102202121 is a wasteful number, since it uses less digits than its factorization.

31102202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12832.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31102202121 its reverse (12120220113), we get a palindrome (43222422234).

The spelling of 31102202121 in words is "thirty-one billion, one hundred two million, two hundred two thousand, one hundred twenty-one".