11111120131 has 2 divisors, whose sum is σ = 11111120132. Its totient is φ = 11111120130.

The previous prime is 11111120123. The next prime is 11111120197. The reversal of 11111120131 is 13102111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111120131 - 2³ = 11111120123 is a prime.

It is a super-2 number, since 2×11111120131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11111120231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555560065 + 5555560066.

It is an arithmetic number, because the mean of its divisors is an integer number (5555560066).

Almost surely, 2^11111120131 is an apocalyptic number.

11111120131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111120131 is an equidigital number, since it uses as much as digits as its factorization.

11111120131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11111120131 its reverse (13102111111), we get a palindrome (24213231242).

The spelling of 11111120131 in words is "eleven billion, one hundred eleven million, one hundred twenty thousand, one hundred thirty-one".