221131332100 has 72 divisors (see below), whose sum is σ = 552086539200. Its totient is φ = 75307585920.

The previous prime is 221131332091. The next prime is 221131332131. The reversal of 221131332100 is 1233131122.

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, 955774 + ... + 1164373.

It is an arithmetic number, because the mean of its divisors is an integer number (7667868600).

Almost surely, 2^221131332100 is an apocalyptic number.

221131332100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221131332100 is an abundant number, since it is smaller than the sum of its proper divisors (330955207100).

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

221131332100 is a wasteful number, since it uses less digits than its factorization.

221131332100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120317 (or 2120310 counting only the distinct ones).

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

Adding to 221131332100 its reverse (1233131122), we get a palindrome (222364463222).

The spelling of 221131332100 in words is "two hundred twenty-one billion, one hundred thirty-one million, three hundred thirty-two thousand, one hundred".