121404551900 has 18 divisors (see below), whose sum is σ = 263447877840. Its totient is φ = 48561820720.

The previous prime is 121404551887. The next prime is 121404551909. The reversal of 121404551900 is 9155404121.

It is a super-2 number, since 2×121404551900² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404551909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 607022660 + ... + 607022859.

Almost surely, 2^121404551900 is an apocalyptic number.

121404551900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121404551900 is an abundant number, since it is smaller than the sum of its proper divisors (142043325940).

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

121404551900 is a wasteful number, since it uses less digits than its factorization.

121404551900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214045533 (or 1214045526 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 121404551900 in words is "one hundred twenty-one billion, four hundred four million, five hundred fifty-one thousand, nine hundred".