121700920 has 32 divisors (see below), whose sum is σ = 298721520. Its totient is φ = 44254720.

The previous prime is 121700899. The next prime is 121700921. The reversal of 121700920 is 29007121.

It is a super-2 number, since 2×121700920² = 29622227857692800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121700891 and 121700900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121700921) 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, 137857 + ... + 138736.

Almost surely, 2^121700920 is an apocalyptic number.

121700920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121700920 is an abundant number, since it is smaller than the sum of its proper divisors (177020600).

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

121700920 is a wasteful number, since it uses less digits than its factorization.

121700920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276615 (or 276611 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 121700920 is about 11031.8139940809. The cubic root of 121700920 is about 495.5619506534.

The spelling of 121700920 in words is "one hundred twenty-one million, seven hundred thousand, nine hundred twenty".