11122111131 has 4 divisors (see below), whose sum is σ = 14829481512. Its totient is φ = 7414740752.

The previous prime is 11122111103. The next prime is 11122111139. The reversal of 11122111131 is 13111122111.

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 11122111131 - 2¹⁴ = 11122094747 is a prime.

It is a super-2 number, since 2×11122111131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11122111131.

It is not an unprimeable number, because it can be changed into a prime (11122111139) 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, 1853685186 + ... + 1853685191.

It is an arithmetic number, because the mean of its divisors is an integer number (3707370378).

Almost surely, 2^11122111131 is an apocalyptic number.

11122111131 is a deficient number, since it is larger than the sum of its proper divisors (3707370381).

11122111131 is an equidigital number, since it uses as much as digits as its factorization.

11122111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707370380.

The product of its digits is 12, while the sum is 15.

Adding to 11122111131 its reverse (13111122111), we get a palindrome (24233233242).

It can be divided in two parts, 11122111 and 131, that multiplied together give a palindrome (1456996541).

The spelling of 11122111131 in words is "eleven billion, one hundred twenty-two million, one hundred eleven thousand, one hundred thirty-one".