121113131 has 4 divisors (see below), whose sum is σ = 121393272. Its totient is φ = 120832992.

The previous prime is 121113119. The next prime is 121113137. The reversal of 121113131 is 131311121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131311121 = 43 ⋅3053747.

It is a cyclic number.

It is not a de Polignac number, because 121113131 - 2⁶ = 121113067 is a prime.

It is a super-2 number, since 2×121113131² = 29336781001246322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (121113137) 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, 139421 + ... + 140286.

It is an arithmetic number, because the mean of its divisors is an integer number (30348318).

Almost surely, 2^121113131 is an apocalyptic number.

121113131 is a deficient number, since it is larger than the sum of its proper divisors (280141).

121113131 is an equidigital number, since it uses as much as digits as its factorization.

121113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280140.

The product of its digits is 18, while the sum is 14.

The square root of 121113131 is about 11005.1411167690. The cubic root of 121113131 is about 494.7628439172.

Adding to 121113131 its reverse (131311121), we get a palindrome (252424252).

The spelling of 121113131 in words is "one hundred twenty-one million, one hundred thirteen thousand, one hundred thirty-one".