121390151436 has 18 divisors (see below), whose sum is σ = 306847327332. Its totient is φ = 40463383800.

The previous prime is 121390151417. The next prime is 121390151459. The reversal of 121390151436 is 634151093121.

121390151436 is a `hidden beast` number, since 1 + 2 + 139 + 0 + 1 + 514 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3371948651 = 121390151436 / (1 + 2 + 1 + 3 + 9 + 0 + 1 + 5 + 1 + 4 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 121390151436.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1685974290 + ... + 1685974361.

Almost surely, 2^121390151436 is an apocalyptic number.

It is an amenable number.

121390151436 is an abundant number, since it is smaller than the sum of its proper divisors (185457175896).

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

121390151436 is a wasteful number, since it uses less digits than its factorization.

121390151436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371948661 (or 3371948656 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 121390151436 in words is "one hundred twenty-one billion, three hundred ninety million, one hundred fifty-one thousand, four hundred thirty-six".