11886115421 has 16 divisors (see below), whose sum is σ = 12884002560. Its totient is φ = 10931585280.

The previous prime is 11886115391. The next prime is 11886115447. The reversal of 11886115421 is 12451168811.

It is a cyclic number.

It is not a de Polignac number, because 11886115421 - 2²⁶ = 11819006557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11886115621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123776 + ... + 197718.

It is an arithmetic number, because the mean of its divisors is an integer number (805250160).

Almost surely, 2^11886115421 is an apocalyptic number.

It is an amenable number.

11886115421 is a deficient number, since it is larger than the sum of its proper divisors (997887139).

11886115421 is a wasteful number, since it uses less digits than its factorization.

11886115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74236.

The product of its digits is 15360, while the sum is 38.

The spelling of 11886115421 in words is "eleven billion, eight hundred eighty-six million, one hundred fifteen thousand, four hundred twenty-one".