121400427500 has 120 divisors (see below), whose sum is σ = 290043418896. Its totient is φ = 44080000000.

The previous prime is 121400427497. The next prime is 121400427509. The reversal of 121400427500 is 5724004121.

It is a self number, because there is not a number n which added to its sum of digits gives 121400427500.

It is not an unprimeable number, because it can be changed into a prime (121400427509) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20924600 + ... + 20930400.

Almost surely, 2^121400427500 is an apocalyptic number.

121400427500 is a gapful number since it is divisible by the number (10) 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 121400427500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145021709448).

121400427500 is an abundant number, since it is smaller than the sum of its proper divisors (168642991396).

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

121400427500 is a wasteful number, since it uses less digits than its factorization.

121400427500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597 (or 6580 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The spelling of 121400427500 in words is "one hundred twenty-one billion, four hundred million, four hundred twenty-seven thousand, five hundred".