1312120123202 has 24 divisors (see below), whose sum is σ = 2289926913660. Its totient is φ = 562236202080.

The previous prime is 1312120123201. The next prime is 1312120123211. The reversal of 1312120123202 is 2023210212131.

It can be written as a sum of positive squares in 2 ways, for example, as 1311531138841 + 588984361 = 1145221^2 + 24269^2 .

It is not an unprimeable number, because it can be changed into a prime (1312120123201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652577 + ... + 1746452.

Almost surely, 2^{1312120123202} is an apocalyptic number.

1312120123202 is a deficient number, since it is larger than the sum of its proper divisors (977806790458).

1312120123202 is a wasteful number, since it uses less digits than its factorization.

1312120123202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404626 (or 2404619 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1312120123202 its reverse (2023210212131), we get a palindrome (3335330335333).

The spelling of 1312120123202 in words is "one trillion, three hundred twelve billion, one hundred twenty million, one hundred twenty-three thousand, two hundred two".