1321515115002 has 12 divisors (see below), whose sum is σ = 2863282749210. Its totient is φ = 440505038328.

The previous prime is 1321515115001. The next prime is 1321515115007. The reversal of 1321515115002 is 2005115151231.

It is a happy number.

1321515115002 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 5 + 151 + 1 + 500 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1170985858641 + 150529256361 = 1082121^2 + 387981^2 .

It is not an unprimeable number, because it can be changed into a prime (1321515115001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36708753177 + ... + 36708753212.

Almost surely, 2^{1321515115002} is an apocalyptic number.

1321515115002 is an abundant number, since it is smaller than the sum of its proper divisors (1541767634208).

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

1321515115002 is a wasteful number, since it uses less digits than its factorization.

1321515115002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73417506397 (or 73417506394 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 1321515115002 in words is "one trillion, three hundred twenty-one billion, five hundred fifteen million, one hundred fifteen thousand, two".