1312120321002 has 32 divisors (see below), whose sum is σ = 2915860368960. Its totient is φ = 437367825360.

The previous prime is 1312120320991. The next prime is 1312120321013. The reversal of 1312120321002 is 2001230212131.

1312120321002 is a `hidden beast` number, since 131 + 212 + 0 + 321 + 0 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1312120320991) and next prime (1312120321013).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8052328 + ... + 8213660.

It is an arithmetic number, because the mean of its divisors is an integer number (91120636530).

Almost surely, 2^{1312120321002} is an apocalyptic number.

1312120321002 is an abundant number, since it is smaller than the sum of its proper divisors (1603740047958).

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

1312120321002 is a wasteful number, since it uses less digits than its factorization.

1312120321002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311955 (or 311949 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1312120321002 its reverse (2001230212131), we get a palindrome (3313350533133).

The spelling of 1312120321002 in words is "one trillion, three hundred twelve billion, one hundred twenty million, three hundred twenty-one thousand, two".