121015120 has 20 divisors (see below), whose sum is σ = 281360340. Its totient is φ = 48406016.

The previous prime is 121015099. The next prime is 121015133. The reversal of 121015120 is 21510121.

It can be written as a sum of positive squares in 2 ways, for example, as 22052416 + 98962704 = 4696^2 + 9948^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×121015120² = 29289318537228800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121015120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756265 + ... + 756424.

It is an arithmetic number, because the mean of its divisors is an integer number (14068017).

Almost surely, 2^121015120 is an apocalyptic number.

121015120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121015120 is an abundant number, since it is smaller than the sum of its proper divisors (160345220).

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

121015120 is a wasteful number, since it uses less digits than its factorization.

121015120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512702 (or 1512696 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 121015120 is about 11000.6872512584. The cubic root of 121015120 is about 494.6293453517.

Adding to 121015120 its reverse (21510121), we get a palindrome (142525241).

The spelling of 121015120 in words is "one hundred twenty-one million, fifteen thousand, one hundred twenty".