31102210012221 has 12 divisors (see below), whose sum is σ = 45123323779872. Its totient is φ = 20643463912776.

The previous prime is 31102210012201. The next prime is 31102210012229. The reversal of 31102210012221 is 12221001220113.

31102210012221 is a `hidden beast` number, since 311 + 0 + 2 + 210 + 0 + 122 + 21 = 666.

It is not a de Polignac number, because 31102210012221 - 2²¹ = 31102207915069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31102210012194 and 31102210012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102210012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7611894681 + ... + 7611898766.

It is an arithmetic number, because the mean of its divisors is an integer number (3760276981656).

Almost surely, 2^{31102210012221} is an apocalyptic number.

It is an amenable number.

31102210012221 is a deficient number, since it is larger than the sum of its proper divisors (14021113767651).

31102210012221 is a wasteful number, since it uses less digits than its factorization.

31102210012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15223793680 (or 15223793677 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 31102210012221 its reverse (12221001220113), we get a palindrome (43323211232334).

The spelling of 31102210012221 in words is "thirty-one trillion, one hundred two billion, two hundred ten million, twelve thousand, two hundred twenty-one".