121999970 has 8 divisors (see below), whose sum is σ = 219599964. Its totient is φ = 48799984.

The previous prime is 121999967. The next prime is 121999991. The reversal of 121999970 is 79999121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 121374289 + 625681 = 11017^2 + 791^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6099989 + ... + 6100008.

Almost surely, 2^121999970 is an apocalyptic number.

121999970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121999970 is a deficient number, since it is larger than the sum of its proper divisors (97599994).

121999970 is a wasteful number, since it uses less digits than its factorization.

121999970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200004.

The product of its (nonzero) digits is 91854, while the sum is 47.

The square root of 121999970 is about 11045.3596591510. The cubic root of 121999970 is about 495.9675257311.

The spelling of 121999970 in words is "one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred seventy".