121001995 has 8 divisors (see below), whose sum is σ = 145305216. Its totient is φ = 96733056.

The previous prime is 121001989. The next prime is 121002001. The reversal of 121001995 is 599100121.

It is an interprime number because it is at equal distance from previous prime (121001989) and next prime (121002001).

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

It is a cyclic number.

It is not a de Polignac number, because 121001995 - 2³ = 121001987 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27 + ... + 15556.

It is an arithmetic number, because the mean of its divisors is an integer number (18163152).

Almost surely, 2^121001995 is an apocalyptic number.

121001995 is a deficient number, since it is larger than the sum of its proper divisors (24303221).

121001995 is a wasteful number, since it uses less digits than its factorization.

121001995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17141.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 121001995 is about 11000.0906814444. The cubic root of 121001995 is about 494.6114626142.

The spelling of 121001995 in words is "one hundred twenty-one million, one thousand, nine hundred ninety-five".