11221122131 has 4 divisors (see below), whose sum is σ = 11226754392. Its totient is φ = 11215489872.

The previous prime is 11221122103. The next prime is 11221122191. The reversal of 11221122131 is 13122112211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13122112211 = 13 ⋅1009393247.

It is a cyclic number.

It is not a de Polignac number, because 11221122131 - 2⁶ = 11221122067 is a prime.

It is a super-2 number, since 2×11221122131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221122191) 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, 2813141 + ... + 2817126.

It is an arithmetic number, because the mean of its divisors is an integer number (2806688598).

Almost surely, 2^11221122131 is an apocalyptic number.

11221122131 is a deficient number, since it is larger than the sum of its proper divisors (5632261).

11221122131 is an equidigital number, since it uses as much as digits as its factorization.

11221122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632260.

The product of its digits is 48, while the sum is 17.

Adding to 11221122131 its reverse (13122112211), we get a palindrome (24343234342).

The spelling of 11221122131 in words is "eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".