121073581 has 4 divisors (see below), whose sum is σ = 121097664. Its totient is φ = 121049500.

The previous prime is 121073549. The next prime is 121073599. The reversal of 121073581 is 185370121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 185370121 = 7867 ⋅23563.

It is a cyclic number.

It is not a de Polignac number, because 121073581 - 2⁵ = 121073549 is a prime.

It is a super-2 number, since 2×121073581² = 29317624032327122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121073501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315 + ... + 15616.

It is an arithmetic number, because the mean of its divisors is an integer number (30274416).

Almost surely, 2^121073581 is an apocalyptic number.

It is an amenable number.

121073581 is a deficient number, since it is larger than the sum of its proper divisors (24083).

121073581 is an equidigital number, since it uses as much as digits as its factorization.

121073581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24082.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 121073581 is about 11003.3440825960. The cubic root of 121073581 is about 494.7089824279.

The spelling of 121073581 in words is "one hundred twenty-one million, seventy-three thousand, five hundred eighty-one".