111345001131 has 32 divisors (see below), whose sum is σ = 185816977920. Its totient is φ = 57735972864.

The previous prime is 111345001121. The next prime is 111345001139. The reversal of 111345001131 is 131100543111.

It is not a de Polignac number, because 111345001131 - 2¹⁷ = 111344870059 is a prime.

It is a super-2 number, since 2×111345001131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 111345001098 and 111345001107.

It is not an unprimeable number, because it can be changed into a prime (111345001139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3440310 + ... + 3472523.

It is an arithmetic number, because the mean of its divisors is an integer number (5806780560).

Almost surely, 2^111345001131 is an apocalyptic number.

111345001131 is a deficient number, since it is larger than the sum of its proper divisors (74471976789).

111345001131 is a wasteful number, since it uses less digits than its factorization.

111345001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912915.

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 111345001131 its reverse (131100543111), we get a palindrome (242445544242).

The spelling of 111345001131 in words is "one hundred eleven billion, three hundred forty-five million, one thousand, one hundred thirty-one".