11172027121 has 4 divisors (see below), whose sum is σ = 11176422912. Its totient is φ = 11167631332.

The previous prime is 11172027109. The next prime is 11172027131. The reversal of 11172027121 is 12172027111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12172027111 = 6763 ⋅1799797.

It is a cyclic number.

It is not a de Polignac number, because 11172027121 - 2³³ = 2582092529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11172027131) 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, 2194081 + ... + 2199166.

It is an arithmetic number, because the mean of its divisors is an integer number (2794105728).

Almost surely, 2^11172027121 is an apocalyptic number.

It is an amenable number.

11172027121 is a deficient number, since it is larger than the sum of its proper divisors (4395791).

11172027121 is an equidigital number, since it uses as much as digits as its factorization.

11172027121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395790.

The product of its (nonzero) digits is 392, while the sum is 25.

The spelling of 11172027121 in words is "eleven billion, one hundred seventy-two million, twenty-seven thousand, one hundred twenty-one".