121201212210100 has 36 divisors (see below), whose sum is σ = 286916324179968. Its totient is φ = 44073168076000.

The previous prime is 121201212210097. The next prime is 121201212210101. The reversal of 121201212210100 is 1012212102121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201212210101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55091458996 + ... + 55091461195.

It is an arithmetic number, because the mean of its divisors is an integer number (7969897893888).

Almost surely, 2^{121201212210100} is an apocalyptic number.

121201212210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201212210100 is an abundant number, since it is smaller than the sum of its proper divisors (165715111969868).

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

121201212210100 is a wasteful number, since it uses less digits than its factorization.

121201212210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110182920216 (or 110182920209 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121201212210100 its reverse (1012212102121), we get a palindrome (122213424312221).

The spelling of 121201212210100 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twelve million, two hundred ten thousand, one hundred".