221100202212220 has 48 divisors (see below), whose sum is σ = 467119439817408. Its totient is φ = 87905095488000.

The previous prime is 221100202212173. The next prime is 221100202212251. The reversal of 221100202212220 is 22212202001122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52525720 + ... + 56578720.

It is an arithmetic number, because the mean of its divisors is an integer number (9731654996196).

Almost surely, 2^{221100202212220} is an apocalyptic number.

221100202212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100202212220 is an abundant number, since it is smaller than the sum of its proper divisors (246019237605188).

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

221100202212220 is a wasteful number, since it uses less digits than its factorization.

221100202212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069510 (or 4069508 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221100202212220 its reverse (22212202001122), we get a palindrome (243312404213342).

The spelling of 221100202212220 in words is "two hundred twenty-one trillion, one hundred billion, two hundred two million, two hundred twelve thousand, two hundred twenty".