111201222131 has 4 divisors (see below), whose sum is σ = 111202153512. Its totient is φ = 111200290752.

The previous prime is 111201222113. The next prime is 111201222199. The reversal of 111201222131 is 131222102111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 131222102111 = 17 ⋅7718947183.

It is a cyclic number.

It is not a de Polignac number, because 111201222131 - 2²⁶ = 111134113267 is a prime.

It is a super-2 number, since 2×111201222131² (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 (111201222031) 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, 254750 + ... + 536003.

It is an arithmetic number, because the mean of its divisors is an integer number (27800538378).

Almost surely, 2^111201222131 is an apocalyptic number.

111201222131 is a deficient number, since it is larger than the sum of its proper divisors (931381).

111201222131 is an equidigital number, since it uses as much as digits as its factorization.

111201222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931380.

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

Adding to 111201222131 its reverse (131222102111), we get a palindrome (242423324242).

The spelling of 111201222131 in words is "one hundred eleven billion, two hundred one million, two hundred twenty-two thousand, one hundred thirty-one".