121686870 has 16 divisors (see below), whose sum is σ = 292048560. Its totient is φ = 32449824.

The previous prime is 121686857. The next prime is 121686883. The reversal of 121686870 is 78686121.

It is an interprime number because it is at equal distance from previous prime (121686857) and next prime (121686883).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028085 + ... + 2028144.

It is an arithmetic number, because the mean of its divisors is an integer number (18253035).

Almost surely, 2^121686870 is an apocalyptic number.

121686870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121686870 is an abundant number, since it is smaller than the sum of its proper divisors (170361690).

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

121686870 is a wasteful number, since it uses less digits than its factorization.

121686870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056239.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 121686870 is about 11031.1771810628. The cubic root of 121686870 is about 495.5428795476.

The spelling of 121686870 in words is "one hundred twenty-one million, six hundred eighty-six thousand, eight hundred seventy".