221320023102 has 48 divisors (see below), whose sum is σ = 492541715952. Its totient is φ = 71771477760.

The previous prime is 221320023049. The next prime is 221320023121. The reversal of 221320023102 is 201320023122.

221320023102 is a `hidden beast` number, since 221 + 320 + 0 + 23 + 102 = 666.

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 23 ways as a sum of consecutive naturals, for example, 10230277 + ... + 10251887.

It is an arithmetic number, because the mean of its divisors is an integer number (10261285749).

Almost surely, 2^221320023102 is an apocalyptic number.

221320023102 is an abundant number, since it is smaller than the sum of its proper divisors (271221692850).

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

221320023102 is a wasteful number, since it uses less digits than its factorization.

221320023102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37033 (or 37030 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221320023102 its reverse (201320023122), we get a palindrome (422640046224).

The spelling of 221320023102 in words is "two hundred twenty-one billion, three hundred twenty million, twenty-three thousand, one hundred two".