1312120100023 has 4 divisors (see below), whose sum is σ = 1369168800048. Its totient is φ = 1255071400000.

The previous prime is 1312120099967. The next prime is 1312120100041. The reversal of 1312120100023 is 3200010212131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312120100023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312120100623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28524349978 + ... + 28524350023.

It is an arithmetic number, because the mean of its divisors is an integer number (342292200012).

Almost surely, 2^{1312120100023} is an apocalyptic number.

1312120100023 is a deficient number, since it is larger than the sum of its proper divisors (57048700025).

1312120100023 is an equidigital number, since it uses as much as digits as its factorization.

1312120100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57048700024.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1312120100023 its reverse (3200010212131), we get a palindrome (4512130312154).

The spelling of 1312120100023 in words is "one trillion, three hundred twelve billion, one hundred twenty million, one hundred thousand, twenty-three".