121615002 has 24 divisors (see below), whose sum is σ = 263832660. Its totient is φ = 40487040.

The previous prime is 121615001. The next prime is 121615031. The reversal of 121615002 is 200516121.

121615002 is a `hidden beast` number, since 1 + 2 + 161 + 500 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 120362841 + 1252161 = 10971^2 + 1119^2 .

It is a super-2 number, since 2×121615002² = 29580417422920008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121615001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12024 + ... + 19692.

Almost surely, 2^121615002 is an apocalyptic number.

121615002 is an abundant number, since it is smaller than the sum of its proper divisors (142217658).

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

121615002 is a wasteful number, since it uses less digits than its factorization.

121615002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8558 (or 8555 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 121615002 is about 11027.9192053624. The cubic root of 121615002 is about 495.4453048214.

The spelling of 121615002 in words is "one hundred twenty-one million, six hundred fifteen thousand, two".