11888927621 has 2 divisors, whose sum is σ = 11888927622. Its totient is φ = 11888927620.

The previous prime is 11888927569. The next prime is 11888927641. The reversal of 11888927621 is 12672988811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7764076996 + 4124850625 = 88114^2 + 64225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11888927621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11888927641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5944463810 + 5944463811.

It is an arithmetic number, because the mean of its divisors is an integer number (5944463811).

Almost surely, 2^11888927621 is an apocalyptic number.

It is an amenable number.

11888927621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11888927621 is an equidigital number, since it uses as much as digits as its factorization.

11888927621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 53.

The spelling of 11888927621 in words is "eleven billion, eight hundred eighty-eight million, nine hundred twenty-seven thousand, six hundred twenty-one".