111121122131 has 4 divisors (see below), whose sum is σ = 111138831312. Its totient is φ = 111103412952.

The previous prime is 111121122113. The next prime is 111121122143. The reversal of 111121122131 is 131221121111.

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 111121122131 - 2⁶ = 111121122067 is a prime.

It is a super-2 number, since 2×111121122131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111121124131) 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, 8845175 + ... + 8857728.

It is an arithmetic number, because the mean of its divisors is an integer number (27784707828).

Almost surely, 2^111121122131 is an apocalyptic number.

111121122131 is a deficient number, since it is larger than the sum of its proper divisors (17709181).

111121122131 is an equidigital number, since it uses as much as digits as its factorization.

111121122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17709180.

The product of its digits is 24, while the sum is 17.

Adding to 111121122131 its reverse (131221121111), we get a palindrome (242342243242).

The spelling of 111121122131 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".