121404444129 has 24 divisors (see below), whose sum is σ = 178312992000. Its totient is φ = 79575423840.

The previous prime is 121404444127. The next prime is 121404444149. The reversal of 121404444129 is 921444404121.

121404444129 is a `hidden beast` number, since 12 + 140 + 44 + 441 + 29 = 666.

It is not a de Polignac number, because 121404444129 - 2¹ = 121404444127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121404444093 and 121404444102.

It is not an unprimeable number, because it can be changed into a prime (121404444127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1270962 + ... + 1363140.

It is an arithmetic number, because the mean of its divisors is an integer number (7429708000).

Almost surely, 2^121404444129 is an apocalyptic number.

It is an amenable number.

121404444129 is a deficient number, since it is larger than the sum of its proper divisors (56908547871).

121404444129 is a wasteful number, since it uses less digits than its factorization.

121404444129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94645 (or 94642 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 121404444129 in words is "one hundred twenty-one billion, four hundred four million, four hundred forty-four thousand, one hundred twenty-nine".