121201122212100 has 144 divisors (see below), whose sum is σ = 445301900937600. Its totient is φ = 27703113644160.

The previous prime is 121201122212057. The next prime is 121201122212143. The reversal of 121201122212100 is 1212221102121.

121201122212100 is a `hidden beast` number, since 1 + 2 + 120 + 112 + 221 + 210 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (121201122212057) and next prime (121201122212143).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 3206359995 + ... + 3206397794.

Almost surely, 2^{121201122212100} is an apocalyptic number.

121201122212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201122212100 is an abundant number, since it is smaller than the sum of its proper divisors (324100778725500).

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

121201122212100 is a wasteful number, since it uses less digits than its factorization.

121201122212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412757819 (or 6412757806 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121201122212100 its reverse (1212221102121), we get a palindrome (122413343314221).

The spelling of 121201122212100 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty-two million, two hundred twelve thousand, one hundred".