221212200222100 has 36 divisors (see below), whose sum is σ = 480045896971200. Its totient is φ = 88482037233760.

The previous prime is 221212200222019. The next prime is 221212200222103. The reversal of 221212200222100 is 1222002212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212200222103) 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, 32406220 + ... + 38634019.

It is an arithmetic number, because the mean of its divisors is an integer number (13334608249200).

Almost surely, 2^{221212200222100} is an apocalyptic number.

221212200222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212200222100 is an abundant number, since it is smaller than the sum of its proper divisors (258833696749100).

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

221212200222100 is a wasteful number, since it uses less digits than its factorization.

221212200222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71071392 (or 71071385 counting only the distinct ones).

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

Adding to 221212200222100 its reverse (1222002212122), we get a palindrome (222434202434222).

The spelling of 221212200222100 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred million, two hundred twenty-two thousand, one hundred".