121398885432 has 160 divisors (see below), whose sum is σ = 372132992880. Its totient is φ = 36669335040.

The previous prime is 121398885401. The next prime is 121398885467. The reversal of 121398885432 is 234588893121.

121398885432 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 98 + 8 + 8 + 543 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2203858 + ... + 2258270.

Almost surely, 2^121398885432 is an apocalyptic number.

121398885432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121398885432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186066496440).

121398885432 is an abundant number, since it is smaller than the sum of its proper divisors (250734107448).

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

121398885432 is a wasteful number, since it uses less digits than its factorization.

121398885432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54755 (or 54742 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 121398885432 in words is "one hundred twenty-one billion, three hundred ninety-eight million, eight hundred eighty-five thousand, four hundred thirty-two".