11651221927 has 2 divisors, whose sum is σ = 11651221928. Its totient is φ = 11651221926.

The previous prime is 11651221919. The next prime is 11651221931. The reversal of 11651221927 is 72912215611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11651221927 - 2³ = 11651221919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11651201927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825610963 + 5825610964.

It is an arithmetic number, because the mean of its divisors is an integer number (5825610964).

Almost surely, 2^11651221927 is an apocalyptic number.

11651221927 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651221927 is an equidigital number, since it uses as much as digits as its factorization.

11651221927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 37.

The spelling of 11651221927 in words is "eleven billion, six hundred fifty-one million, two hundred twenty-one thousand, nine hundred twenty-seven".