121390170 has 32 divisors (see below), whose sum is σ = 317822400. Its totient is φ = 29427840.

The previous prime is 121390169. The next prime is 121390177. The reversal of 121390170 is 71093121.

It is a self number, because there is not a number n which added to its sum of digits gives 121390170.

It is not an unprimeable number, because it can be changed into a prime (121390177) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 183595 + ... + 184254.

It is an arithmetic number, because the mean of its divisors is an integer number (9931950).

Almost surely, 2^121390170 is an apocalyptic number.

121390170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121390170 is an abundant number, since it is smaller than the sum of its proper divisors (196432230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121390170 is a wasteful number, since it uses less digits than its factorization.

121390170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367870.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 121390170 is about 11017.7207261756. The cubic root of 121390170 is about 495.1398033846.

The spelling of 121390170 in words is "one hundred twenty-one million, three hundred ninety thousand, one hundred seventy".