11957217227 has 4 divisors (see below), whose sum is σ = 11969979336. Its totient is φ = 11944455120.

The previous prime is 11957217211. The next prime is 11957217229. The reversal of 11957217227 is 72271275911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11957217227 - 2⁴ = 11957217211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11957217229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6379649 + ... + 6381522.

It is an arithmetic number, because the mean of its divisors is an integer number (2992494834).

Almost surely, 2^11957217227 is an apocalyptic number.

11957217227 is a deficient number, since it is larger than the sum of its proper divisors (12762109).

11957217227 is an equidigital number, since it uses as much as digits as its factorization.

11957217227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12762108.

The product of its digits is 123480, while the sum is 44.

The spelling of 11957217227 in words is "eleven billion, nine hundred fifty-seven million, two hundred seventeen thousand, two hundred twenty-seven".