121512131 has 8 divisors (see below), whose sum is σ = 131234880. Its totient is φ = 111843072.

The previous prime is 121512103. The next prime is 121512173. The reversal of 121512131 is 131215121.

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 121512131 - 2¹⁸ = 121249987 is a prime.

It is a super-2 number, since 2×121512131² = 29530395960322322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121512101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8651 + ... + 17828.

It is an arithmetic number, because the mean of its divisors is an integer number (16404360).

Almost surely, 2^121512131 is an apocalyptic number.

121512131 is a deficient number, since it is larger than the sum of its proper divisors (9722749).

121512131 is a wasteful number, since it uses less digits than its factorization.

121512131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26845.

The product of its digits is 60, while the sum is 17.

The square root of 121512131 is about 11023.2541021243. The cubic root of 121512131 is about 495.3055706043.

Adding to 121512131 its reverse (131215121), we get a palindrome (252727252).

The spelling of 121512131 in words is "one hundred twenty-one million, five hundred twelve thousand, one hundred thirty-one".