121695288 has 128 divisors (see below), whose sum is σ = 364089600. Its totient is φ = 33408000.

The previous prime is 121695271. The next prime is 121695391. The reversal of 121695288 is 882596121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202188 + ... + 202788.

It is an arithmetic number, because the mean of its divisors is an integer number (2844450).

Almost surely, 2^121695288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121695288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182044800).

121695288 is an abundant number, since it is smaller than the sum of its proper divisors (242394312).

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

121695288 is a wasteful number, since it uses less digits than its factorization.

121695288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 121695288 is about 11031.5587293909. The cubic root of 121695288 is about 495.5543060989.

The spelling of 121695288 in words is "one hundred twenty-one million, six hundred ninety-five thousand, two hundred eighty-eight".