121399670 has 16 divisors (see below), whose sum is σ = 249736608. Its totient is φ = 41622720.

The previous prime is 121399667. The next prime is 121399693. The reversal of 121399670 is 76993121.

It is a happy number.

It is a super-2 number, since 2×121399670² = 29475759752217800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867071 + ... + 867210.

It is an arithmetic number, because the mean of its divisors is an integer number (15608538).

Almost surely, 2^121399670 is an apocalyptic number.

121399670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121399670 is an abundant number, since it is smaller than the sum of its proper divisors (128336938).

121399670 is a wasteful number, since it uses less digits than its factorization.

121399670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734295.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 121399670 is about 11018.1518413934. The cubic root of 121399670 is about 495.1527196019.

The spelling of 121399670 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, six hundred seventy".