221220000100122 has 16 divisors (see below), whose sum is σ = 442446403090080. Its totient is φ = 73738932885072.

The previous prime is 221220000100111. The next prime is 221220000100313. The reversal of 221220000100122 is 221001000022122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266337868 + ... + 267167175.

It is an arithmetic number, because the mean of its divisors is an integer number (27652900193130).

Almost surely, 2^{221220000100122} is an apocalyptic number.

221220000100122 is an abundant number, since it is smaller than the sum of its proper divisors (221226402989958).

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

221220000100122 is a wasteful number, since it uses less digits than its factorization.

221220000100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533574157.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221220000100122 its reverse (221001000022122), we get a palindrome (442221000122244).

The spelling of 221220000100122 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred thousand, one hundred twenty-two".