1240121455836 has 96 divisors (see below), whose sum is σ = 2943095081472. Its totient is φ = 406374693120.

The previous prime is 1240121455819. The next prime is 1240121455847. The reversal of 1240121455836 is 6385541210421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113175270 + ... + 113186226.

It is an arithmetic number, because the mean of its divisors is an integer number (30657240432).

Almost surely, 2^{1240121455836} is an apocalyptic number.

It is an amenable number.

1240121455836 is an abundant number, since it is smaller than the sum of its proper divisors (1702973625636).

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

1240121455836 is a wasteful number, since it uses less digits than its factorization.

1240121455836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11739 (or 11737 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 1240121455836 in words is "one trillion, two hundred forty billion, one hundred twenty-one million, four hundred fifty-five thousand, eight hundred thirty-six".