31220121201102 has 64 divisors (see below), whose sum is σ = 70070576961600. Its totient is φ = 10302844118400.

The previous prime is 31220121201097. The next prime is 31220121201163. The reversal of 31220121201102 is 20110212102213.

31220121201102 is a `hidden beast` number, since 312 + 20 + 121 + 201 + 10 + 2 = 666.

It is a super-2 number, since 2×31220121201102² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69746268 + ... + 70192464.

It is an arithmetic number, because the mean of its divisors is an integer number (1094852765025).

Almost surely, 2^{31220121201102} is an apocalyptic number.

31220121201102 is an abundant number, since it is smaller than the sum of its proper divisors (38850455760498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220121201102 is a wasteful number, since it uses less digits than its factorization.

31220121201102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459138 (or 459132 counting only the distinct ones).

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

Adding to 31220121201102 its reverse (20110212102213), we get a palindrome (51330333303315).

The spelling of 31220121201102 in words is "thirty-one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred one thousand, one hundred two".