121012859 has 4 divisors (see below), whose sum is σ = 132014040. Its totient is φ = 110011680.

The previous prime is 121012849. The next prime is 121012877. The reversal of 121012859 is 958210121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121012859 - 2⁸ = 121012603 is a prime.

It is a super-2 number, since 2×121012859² = 29288224086707762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121012849) 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, 5500574 + ... + 5500595.

It is an arithmetic number, because the mean of its divisors is an integer number (33003510).

Almost surely, 2^121012859 is an apocalyptic number.

121012859 is a deficient number, since it is larger than the sum of its proper divisors (11001181).

121012859 is a wasteful number, since it uses less digits than its factorization.

121012859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001180.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 121012859 is about 11000.5844844717. The cubic root of 121012859 is about 494.6262648443.

The spelling of 121012859 in words is "one hundred twenty-one million, twelve thousand, eight hundred fifty-nine".