121646131 has 4 divisors (see below), whose sum is σ = 121669000. Its totient is φ = 121623264.

The previous prime is 121646123. The next prime is 121646143. The reversal of 121646131 is 131646121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131646121 = 41 ⋅3210881.

It is a cyclic number.

It is not a de Polignac number, because 121646131 - 2³ = 121646123 is a prime.

It is a super-2 number, since 2×121646131² = 29595562374538322, 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 = 121646096 and 121646105.

It is not an unprimeable number, because it can be changed into a prime (121646111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195 + ... + 15643.

It is an arithmetic number, because the mean of its divisors is an integer number (30417250).

Almost surely, 2^121646131 is an apocalyptic number.

121646131 is a deficient number, since it is larger than the sum of its proper divisors (22869).

121646131 is an equidigital number, since it uses as much as digits as its factorization.

121646131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22868.

The product of its digits is 864, while the sum is 25.

The square root of 121646131 is about 11029.3304873868. The cubic root of 121646131 is about 495.4875731845.

The spelling of 121646131 in words is "one hundred twenty-one million, six hundred forty-six thousand, one hundred thirty-one".