11920561171 has 8 divisors (see below), whose sum is σ = 11951153280. Its totient is φ = 11889993792.

The previous prime is 11920561153. The next prime is 11920561189. The reversal of 11920561171 is 17116502911.

It is an interprime number because it is at equal distance from previous prime (11920561153) and next prime (11920561189).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11920561171 - 2⁷ = 11920561043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11920561571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294941 + ... + 1304113.

It is an arithmetic number, because the mean of its divisors is an integer number (1493894160).

Almost surely, 2^11920561171 is an apocalyptic number.

11920561171 is a deficient number, since it is larger than the sum of its proper divisors (30592109).

11920561171 is an equidigital number, since it uses as much as digits as its factorization.

11920561171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12365.

The product of its (nonzero) digits is 3780, while the sum is 34.

The spelling of 11920561171 in words is "eleven billion, nine hundred twenty million, five hundred sixty-one thousand, one hundred seventy-one".