222101221222100 has 72 divisors (see below), whose sum is σ = 527085322255296. Its totient is φ = 80562673600000.

The previous prime is 222101221222087. The next prime is 222101221222123. The reversal of 222101221222100 is 1222122101222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 251317256 + ... + 252199455.

It is an arithmetic number, because the mean of its divisors is an integer number (7320629475768).

Almost surely, 2^{222101221222100} is an apocalyptic number.

222101221222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222101221222100 is an abundant number, since it is smaller than the sum of its proper divisors (304984101033196).

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

222101221222100 is a wasteful number, since it uses less digits than its factorization.

222101221222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503517137 (or 503517130 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222101221222100 its reverse (1222122101222), we get a palindrome (223323343323322).

The spelling of 222101221222100 in words is "two hundred twenty-two trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred".