121379966 has 16 divisors (see below), whose sum is σ = 193233600. Its totient is φ = 56985600.

The previous prime is 121379963. The next prime is 121379981. The reversal of 121379966 is 669973121.

It is a super-2 number, since 2×121379966² = 29466192292322312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121379963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11291 + ... + 19241.

It is an arithmetic number, because the mean of its divisors is an integer number (12077100).

Almost surely, 2^121379966 is an apocalyptic number.

121379966 is a deficient number, since it is larger than the sum of its proper divisors (71853634).

121379966 is a wasteful number, since it uses less digits than its factorization.

121379966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8419.

The product of its digits is 122472, while the sum is 44.

The square root of 121379966 is about 11017.2576442598. The cubic root of 121379966 is about 495.1259292570.

The spelling of 121379966 in words is "one hundred twenty-one million, three hundred seventy-nine thousand, nine hundred sixty-six".