122115531 has 16 divisors (see below), whose sum is σ = 165737600. Its totient is φ = 79964928.

The previous prime is 122115529. The next prime is 122115559. The reversal of 122115531 is 135511221.

It is not a de Polignac number, because 122115531 - 2¹ = 122115529 is a prime.

It is a super-2 number, since 2×122115531² = 29824405822823922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122115498 and 122115507.

It is not an unprimeable number, because it can be changed into a prime (122115731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38940 + ... + 41958.

It is an arithmetic number, because the mean of its divisors is an integer number (10358600).

Almost surely, 2^122115531 is an apocalyptic number.

122115531 is a deficient number, since it is larger than the sum of its proper divisors (43622069).

122115531 is a wasteful number, since it uses less digits than its factorization.

122115531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258.

The product of its digits is 300, while the sum is 21.

The square root of 122115531 is about 11050.5896222781. The cubic root of 122115531 is about 496.1240733550.

Adding to 122115531 its reverse (135511221), we get a palindrome (257626752).

The spelling of 122115531 in words is "one hundred twenty-two million, one hundred fifteen thousand, five hundred thirty-one".