221200102122 has 64 divisors (see below), whose sum is σ = 478673677440. Its totient is φ = 67915929600.

The previous prime is 221200102091. The next prime is 221200102133. The reversal of 221200102122 is 221201002122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1288722 + ... + 1450242.

It is an arithmetic number, because the mean of its divisors is an integer number (7479276210).

Almost surely, 2^221200102122 is an apocalyptic number.

221200102122 is an abundant number, since it is smaller than the sum of its proper divisors (257473575318).

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

221200102122 is a wasteful number, since it uses less digits than its factorization.

221200102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161879.

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

Adding to 221200102122 its reverse (221201002122), we get a palindrome (442401104244).

The spelling of 221200102122 in words is "two hundred twenty-one billion, two hundred million, one hundred two thousand, one hundred twenty-two".