121755670 has 16 divisors (see below), whose sum is σ = 220430160. Its totient is φ = 48420064.

The previous prime is 121755637. The next prime is 121755671. The reversal of 121755670 is 76557121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755671) 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, 33460 + ... + 36919.

It is an arithmetic number, because the mean of its divisors is an integer number (13776885).

Almost surely, 2^121755670 is an apocalyptic number.

121755670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121755670 is a deficient number, since it is larger than the sum of its proper divisors (98674490).

121755670 is a wasteful number, since it uses less digits than its factorization.

121755670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70559.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 121755670 is about 11034.2951745909. The cubic root of 121755670 is about 495.6362528832.

The spelling of 121755670 in words is "one hundred twenty-one million, seven hundred fifty-five thousand, six hundred seventy".