122120210021100 has 72 divisors (see below), whose sum is σ = 353572091271168. Its totient is φ = 32543489160000.

The previous prime is 122120210021087. The next prime is 122120210021111. The reversal of 122120210021100 is 1120012021221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 122120210021100.

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, 136429276 + ... + 137321475.

Almost surely, 2^{122120210021100} is an apocalyptic number.

122120210021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122120210021100 is an abundant number, since it is smaller than the sum of its proper divisors (231451881250068).

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

122120210021100 is a wasteful number, since it uses less digits than its factorization.

122120210021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273752255 (or 273752248 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122120210021100 its reverse (1120012021221), we get a palindrome (123240222042321).

The spelling of 122120210021100 in words is "one hundred twenty-two trillion, one hundred twenty billion, two hundred ten million, twenty-one thousand, one hundred".