121101202112100 has 144 divisors (see below), whose sum is σ = 400489444118400. Its totient is φ = 27676947409920.

The previous prime is 121101202112087. The next prime is 121101202112101. The reversal of 121101202112100 is 1211202101121.

It is a happy number.

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 121101202112100.

It is not an unprimeable number, because it can be changed into a prime (121101202112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14029066 + ... + 20952734.

Almost surely, 2^{121101202112100} is an apocalyptic number.

121101202112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101202112100 is an abundant number, since it is smaller than the sum of its proper divisors (279388242006300).

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

121101202112100 is a wasteful number, since it uses less digits than its factorization.

121101202112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932022 (or 6932015 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121101202112100 its reverse (1211202101121), we get a palindrome (122312404213221).

The spelling of 121101202112100 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred two million, one hundred twelve thousand, one hundred".