121401455424 has 56 divisors (see below), whose sum is σ = 321700245600. Its totient is φ = 40405138944.

The previous prime is 121401455401. The next prime is 121401455431. The reversal of 121401455424 is 424554104121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358774 + ... + 609525.

Almost surely, 2^121401455424 is an apocalyptic number.

It is an amenable number.

121401455424 is an abundant number, since it is smaller than the sum of its proper divisors (200298790176).

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

121401455424 is an equidigital number, since it uses as much as digits as its factorization.

121401455424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968967 (or 968957 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

Adding to 121401455424 its reverse (424554104121), we get a palindrome (545955559545).

The spelling of 121401455424 in words is "one hundred twenty-one billion, four hundred one million, four hundred fifty-five thousand, four hundred twenty-four".