121858402 has 8 divisors (see below), whose sum is σ = 183462912. Its totient is φ = 60704100.

The previous prime is 121858391. The next prime is 121858411. The reversal of 121858402 is 204858121.

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

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 3 ways as a sum of consecutive naturals, for example, 111874 + ... + 112957.

It is an arithmetic number, because the mean of its divisors is an integer number (22932864).

Almost surely, 2^121858402 is an apocalyptic number.

121858402 is a deficient number, since it is larger than the sum of its proper divisors (61604510).

121858402 is a wasteful number, since it uses less digits than its factorization.

121858402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225104.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 121858402 is about 11038.9493159449. The cubic root of 121858402 is about 495.7756122782.

The spelling of 121858402 in words is "one hundred twenty-one million, eight hundred fifty-eight thousand, four hundred two".