122222220121100 has 72 divisors (see below), whose sum is σ = 294237283233600. Its totient is φ = 43691148001600.

The previous prime is 122222220121087. The next prime is 122222220121181. The reversal of 122222220121100 is 1121022222221.

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

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, 941554670 + ... + 941684469.

It is an arithmetic number, because the mean of its divisors is an integer number (4086628933800).

Almost surely, 2^{122222220121100} is an apocalyptic number.

122222220121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122222220121100 is an abundant number, since it is smaller than the sum of its proper divisors (172015063112500).

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

122222220121100 is a wasteful number, since it uses less digits than its factorization.

122222220121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883239223 (or 1883239216 counting only the distinct ones).

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

Adding to 122222220121100 its reverse (1121022222221), we get a palindrome (123343242343321).

The spelling of 122222220121100 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, two hundred twenty million, one hundred twenty-one thousand, one hundred".