11223121131 has 40 divisors (see below), whose sum is σ = 17177119344. Its totient is φ = 7298786880.

The previous prime is 11223121109. The next prime is 11223121139. The reversal of 11223121131 is 13112132211.

It is not a de Polignac number, because 11223121131 - 2⁶ = 11223121067 is a prime.

It is a super-2 number, since 2×11223121131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11223121139) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3693945 + ... + 3696981.

Almost surely, 2^11223121131 is an apocalyptic number.

11223121131 is a deficient number, since it is larger than the sum of its proper divisors (5953998213).

11223121131 is a wasteful number, since it uses less digits than its factorization.

11223121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4153 (or 4144 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11223121131 its reverse (13112132211), we get a palindrome (24335253342).

The spelling of 11223121131 in words is "eleven billion, two hundred twenty-three million, one hundred twenty-one thousand, one hundred thirty-one".