121795900 has 72 divisors (see below), whose sum is σ = 276232320. Its totient is φ = 46560000.

The previous prime is 121795889. The next prime is 121795903. The reversal of 121795900 is 9597121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121795903) 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, 312906 + ... + 313294.

It is an arithmetic number, because the mean of its divisors is an integer number (3836560).

Almost surely, 2^121795900 is an apocalyptic number.

121795900 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 121795900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138116160).

121795900 is an abundant number, since it is smaller than the sum of its proper divisors (154436420).

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

121795900 is a wasteful number, since it uses less digits than its factorization.

121795900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 121795900 is about 11036.1179768975. The cubic root of 121795900 is about 495.6908355589.

The spelling of 121795900 in words is "one hundred twenty-one million, seven hundred ninety-five thousand, nine hundred".