1312251521002 has 4 divisors (see below), whose sum is σ = 1968377281506. Its totient is φ = 656125760500.

The previous prime is 1312251520889. The next prime is 1312251521003. The reversal of 1312251521002 is 2001251522131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1080458381401 + 231793139601 = 1039451^2 + 481449^2 .

It is not an unprimeable number, because it can be changed into a prime (1312251521003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328062880249 + ... + 328062880252.

Almost surely, 2^{1312251521002} is an apocalyptic number.

1312251521002 is a deficient number, since it is larger than the sum of its proper divisors (656125760504).

1312251521002 is an equidigital number, since it uses as much as digits as its factorization.

1312251521002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656125760503.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 1312251521002 in words is "one trillion, three hundred twelve billion, two hundred fifty-one million, five hundred twenty-one thousand, two".