121606920 has 96 divisors (see below), whose sum is σ = 409893120. Its totient is φ = 32425920.

The previous prime is 121606879. The next prime is 121606921. The reversal of 121606920 is 29606121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121606921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3465 + ... + 15975.

It is an arithmetic number, because the mean of its divisors is an integer number (4269720).

Almost surely, 2^121606920 is an apocalyptic number.

121606920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121606920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204946560).

121606920 is an abundant number, since it is smaller than the sum of its proper divisors (288286200).

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

121606920 is a wasteful number, since it uses less digits than its factorization.

121606920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537 (or 12521 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 121606920 is about 11027.5527656865. The cubic root of 121606920 is about 495.4343295371.

The spelling of 121606920 in words is "one hundred twenty-one million, six hundred six thousand, nine hundred twenty".