121987131476 has 12 divisors (see below), whose sum is σ = 243974263008. Its totient is φ = 52280199192.

The previous prime is 121987131473. The next prime is 121987131499. The reversal of 121987131476 is 674131789121.

121987131476 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121987131473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178341606 + ... + 2178341661.

It is an arithmetic number, because the mean of its divisors is an integer number (20331188584).

Almost surely, 2^121987131476 is an apocalyptic number.

It is an amenable number.

121987131476 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121987131476 is a wasteful number, since it uses less digits than its factorization.

121987131476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356683278 (or 4356683276 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The spelling of 121987131476 in words is "one hundred twenty-one billion, nine hundred eighty-seven million, one hundred thirty-one thousand, four hundred seventy-six".