121283855 has 32 divisors (see below), whose sum is σ = 182435328. Its totient is φ = 75196800.

The previous prime is 121283849. The next prime is 121283893. The reversal of 121283855 is 558382121.

It is not a de Polignac number, because 121283855 - 2¹⁰ = 121282831 is a prime.

It is a super-2 number, since 2×121283855² = 29419546967322050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80489 + ... + 81981.

It is an arithmetic number, because the mean of its divisors is an integer number (5701104).

Almost surely, 2^121283855 is an apocalyptic number.

121283855 is a deficient number, since it is larger than the sum of its proper divisors (61151473).

121283855 is a wasteful number, since it uses less digits than its factorization.

121283855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727.

The product of its digits is 19200, while the sum is 35.

The square root of 121283855 is about 11012.8949418398. The cubic root of 121283855 is about 494.9952113267.

The spelling of 121283855 in words is "one hundred twenty-one million, two hundred eighty-three thousand, eight hundred fifty-five".