221312110212100 has 72 divisors (see below), whose sum is σ = 481155104276000. Its totient is φ = 88357638758400.

The previous prime is 221312110212079. The next prime is 221312110212139. The reversal of 221312110212100 is 1212011213122.

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, 129806155 + ... + 131500045.

Almost surely, 2^{221312110212100} is an apocalyptic number.

221312110212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221312110212100 is an abundant number, since it is smaller than the sum of its proper divisors (259842994063900).

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

221312110212100 is a wasteful number, since it uses less digits than its factorization.

221312110212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696373 (or 1696366 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 221312110212100 its reverse (1212011213122), we get a palindrome (222524121425222).

The spelling of 221312110212100 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred ten million, two hundred twelve thousand, one hundred".