121915224860 has 96 divisors (see below), whose sum is σ = 300965015232. Its totient is φ = 40897566720.

The previous prime is 121915224857. The next prime is 121915224863. The reversal of 121915224860 is 68422519121.

It is an interprime number because it is at equal distance from previous prime (121915224857) and next prime (121915224863).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121915224863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5001422 + ... + 5025738.

It is an arithmetic number, because the mean of its divisors is an integer number (3135052242).

Almost surely, 2^121915224860 is an apocalyptic number.

121915224860 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 121915224860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150482507616).

121915224860 is an abundant number, since it is smaller than the sum of its proper divisors (179049790372).

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

121915224860 is a wasteful number, since it uses less digits than its factorization.

121915224860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26103 (or 26101 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 121915224860 in words is "one hundred twenty-one billion, nine hundred fifteen million, two hundred twenty-four thousand, eight hundred sixty".