122001020100 has 144 divisors (see below), whose sum is σ = 398858846400. Its totient is φ = 31982146560.

The previous prime is 122001020039. The next prime is 122001020101. The reversal of 122001020100 is 1020100221.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (122001020101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223629 + ... + 542228.

It is an arithmetic number, because the mean of its divisors is an integer number (2769853100).

Almost surely, 2^122001020100 is an apocalyptic number.

122001020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122001020100 is an abundant number, since it is smaller than the sum of its proper divisors (276857826300).

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

122001020100 is a wasteful number, since it uses less digits than its factorization.

122001020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765939 (or 765926 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 122001020100 its reverse (1020100221), we get a palindrome (123021120321).

The spelling of 122001020100 in words is "one hundred twenty-two billion, one million, twenty thousand, one hundred".