122221012120100 has 72 divisors (see below), whose sum is σ = 280085231522880. Its totient is φ = 46199414462080.

The previous prime is 122221012120099. The next prime is 122221012120157. The reversal of 122221012120100 is 1021210122221.

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, 319926995 + ... + 320308794.

It is an arithmetic number, because the mean of its divisors is an integer number (3890072660040).

Almost surely, 2^{122221012120100} is an apocalyptic number.

122221012120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122221012120100 is an abundant number, since it is smaller than the sum of its proper divisors (157864219402780).

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

122221012120100 is a wasteful number, since it uses less digits than its factorization.

122221012120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640235909 (or 640235902 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122221012120100 its reverse (1021210122221), we get a palindrome (123242222242321).

The spelling of 122221012120100 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, twelve million, one hundred twenty thousand, one hundred".