121663970 has 16 divisors (see below), whose sum is σ = 219120768. Its totient is φ = 48637680.

The previous prime is 121663957. The next prime is 121663981. The reversal of 121663970 is 79366121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121663970.

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, 32285 + ... + 35855.

It is an arithmetic number, because the mean of its divisors is an integer number (13695048).

Almost surely, 2^121663970 is an apocalyptic number.

121663970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121663970 is a deficient number, since it is larger than the sum of its proper divisors (97456798).

121663970 is a wasteful number, since it uses less digits than its factorization.

121663970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 121663970 is about 11030.1391650332. The cubic root of 121663970 is about 495.5117925348.

The spelling of 121663970 in words is "one hundred twenty-one million, six hundred sixty-three thousand, nine hundred seventy".