121012865 has 8 divisors (see below), whose sum is σ = 145274688. Its totient is φ = 96770800.

The previous prime is 121012849. The next prime is 121012877. The reversal of 121012865 is 568210121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121012865 - 2⁴ = 121012849 is a prime.

It is a super-2 number, since 2×121012865² = 29288226991016450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19940 + ... + 25290.

It is an arithmetic number, because the mean of its divisors is an integer number (18159336).

Almost surely, 2^121012865 is an apocalyptic number.

It is an amenable number.

121012865 is a deficient number, since it is larger than the sum of its proper divisors (24261823).

121012865 is an equidigital number, since it uses as much as digits as its factorization.

121012865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9879.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 121012865 is about 11000.5847571845. The cubic root of 121012865 is about 494.6262730191.

Adding to 121012865 its reverse (568210121), we get a palindrome (689222986).

The spelling of 121012865 in words is "one hundred twenty-one million, twelve thousand, eight hundred sixty-five".