111211331131 has 8 divisors (see below), whose sum is σ = 113955451344. Its totient is φ = 108468718080.

The previous prime is 111211331111. The next prime is 111211331137. The reversal of 111211331131 is 131133112111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111211331131 - 2²¹ = 111209233979 is a prime.

It is a super-2 number, since 2×111211331131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211331099 and 111211331108.

It is not an unprimeable number, because it can be changed into a prime (111211331137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226665 + ... + 523258.

It is an arithmetic number, because the mean of its divisors is an integer number (14244431418).

Almost surely, 2^111211331131 is an apocalyptic number.

111211331131 is a deficient number, since it is larger than the sum of its proper divisors (2744120213).

111211331131 is an equidigital number, since it uses as much as digits as its factorization.

111211331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753581.

The product of its digits is 54, while the sum is 19.

Adding to 111211331131 its reverse (131133112111), we get a palindrome (242344443242).

The spelling of 111211331131 in words is "one hundred eleven billion, two hundred eleven million, three hundred thirty-one thousand, one hundred thirty-one".