121164131 has 4 divisors (see below), whose sum is σ = 132179064. Its totient is φ = 110149200.

The previous prime is 121164091. The next prime is 121164179. The reversal of 121164131 is 131461121.

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: 131461121 = 11 ⋅11951011.

It is a cyclic number.

It is not a de Polignac number, because 121164131 - 2¹⁸ = 120901987 is a prime.

It is a super-2 number, since 2×121164131² = 29361493281970322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121164031) 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, 5507450 + ... + 5507471.

It is an arithmetic number, because the mean of its divisors is an integer number (33044766).

Almost surely, 2^121164131 is an apocalyptic number.

121164131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121164131 is a deficient number, since it is larger than the sum of its proper divisors (11014933).

121164131 is a wasteful number, since it uses less digits than its factorization.

121164131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014932.

The product of its digits is 144, while the sum is 20.

The square root of 121164131 is about 11007.4579717571. The cubic root of 121164131 is about 494.8322813759.

The spelling of 121164131 in words is "one hundred twenty-one million, one hundred sixty-four thousand, one hundred thirty-one".