121983870 has 16 divisors (see below), whose sum is σ = 292761360. Its totient is φ = 32529024.

The previous prime is 121983863. The next prime is 121983877. The reversal of 121983870 is 78389121.

It is an interprime number because it is at equal distance from previous prime (121983863) and next prime (121983877).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121983877) 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, 2033035 + ... + 2033094.

It is an arithmetic number, because the mean of its divisors is an integer number (18297585).

Almost surely, 2^121983870 is an apocalyptic number.

121983870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121983870 is an abundant number, since it is smaller than the sum of its proper divisors (170777490).

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

121983870 is a wasteful number, since it uses less digits than its factorization.

121983870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066139.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 121983870 is about 11044.6308222593. The cubic root of 121983870 is about 495.9457076153.

The spelling of 121983870 in words is "one hundred twenty-one million, nine hundred eighty-three thousand, eight hundred seventy".