221331213100 has 36 divisors (see below), whose sum is σ = 483794519544. Its totient is φ = 87886257280.

The previous prime is 221331213097. The next prime is 221331213101. The reversal of 221331213100 is 1312133122.

It is a super-2 number, since 2×221331213100² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221331213101) 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, 8064082 + ... + 8091481.

It is an arithmetic number, because the mean of its divisors is an integer number (13438736654).

Almost surely, 2^221331213100 is an apocalyptic number.

221331213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221331213100 is an abundant number, since it is smaller than the sum of its proper divisors (262463306444).

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

221331213100 is a wasteful number, since it uses less digits than its factorization.

221331213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16155714 (or 16155707 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221331213100 its reverse (1312133122), we get a palindrome (222643346222).

The spelling of 221331213100 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred".