122111012100 has 144 divisors (see below), whose sum is σ = 440487806976. Its totient is φ = 25373712000.

The previous prime is 122111012069. The next prime is 122111012113. The reversal of 122111012100 is 1210111221.

It is a super-2 number, since 2×122111012100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2619996 + ... + 2666195.

It is an arithmetic number, because the mean of its divisors is an integer number (3058943104).

Almost surely, 2^122111012100 is an apocalyptic number.

122111012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122111012100 is an abundant number, since it is smaller than the sum of its proper divisors (318376794876).

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

122111012100 is a wasteful number, since it uses less digits than its factorization.

122111012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286226 (or 5286219 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 122111012100 its reverse (1210111221), we get a palindrome (123321123321).

The spelling of 122111012100 in words is "one hundred twenty-two billion, one hundred eleven million, twelve thousand, one hundred".