1312001320402 has 32 divisors (see below), whose sum is σ = 2086498858752. Its totient is φ = 617910177024.

The previous prime is 1312001320397. The next prime is 1312001320411. The reversal of 1312001320402 is 2040231002131.

It is a happy number.

It is a super-2 number, since 2×1312001320402² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1312001320402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1464858 + ... + 2183989.

It is an arithmetic number, because the mean of its divisors is an integer number (65203089336).

Almost surely, 2^{1312001320402} is an apocalyptic number.

1312001320402 is a deficient number, since it is larger than the sum of its proper divisors (774497538350).

1312001320402 is a wasteful number, since it uses less digits than its factorization.

1312001320402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649042.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1312001320402 its reverse (2040231002131), we get a palindrome (3352232322533).

The spelling of 1312001320402 in words is "one trillion, three hundred twelve billion, one million, three hundred twenty thousand, four hundred two".