121399444404 has 72 divisors (see below), whose sum is σ = 351282072960. Its totient is φ = 34628928192.

The previous prime is 121399444393. The next prime is 121399444423. The reversal of 121399444404 is 404444993121.

121399444404 is a `hidden beast` number, since 121 + 39 + 94 + 4 + 4 + 404 = 666.

121399444404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 121399444404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238464 + ... + 547415.

It is an arithmetic number, because the mean of its divisors is an integer number (4878917680).

Almost surely, 2^121399444404 is an apocalyptic number.

121399444404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121399444404 is an abundant number, since it is smaller than the sum of its proper divisors (229882628556).

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

121399444404 is a wasteful number, since it uses less digits than its factorization.

121399444404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786509 (or 786504 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 121399444404 in words is "one hundred twenty-one billion, three hundred ninety-nine million, four hundred forty-four thousand, four hundred four".