121202100021200 has 120 divisors (see below), whose sum is σ = 317677647391776. Its totient is φ = 44070998848000.

The previous prime is 121202100021181. The next prime is 121202100021251. The reversal of 121202100021200 is 2120001202121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77950574 + ... + 79490226.

Almost surely, 2^{121202100021200} is an apocalyptic number.

121202100021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202100021200 is an abundant number, since it is smaller than the sum of its proper divisors (196475547370576).

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

121202100021200 is a wasteful number, since it uses less digits than its factorization.

121202100021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557573 (or 1557562 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121202100021200 its reverse (2120001202121), we get a palindrome (123322101223321).

The spelling of 121202100021200 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred million, twenty-one thousand, two hundred".