1023312212113 has 4 divisors (see below), whose sum is σ = 1023910992180. Its totient is φ = 1022713432048.

The previous prime is 1023312212099. The next prime is 1023312212123. The reversal of 1023312212113 is 3112122133201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 666415893649 + 356896318464 = 816343^2 + 597408^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023312212113 - 2²⁹ = 1022775341201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023312212123) 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, 299387470 + ... + 299390887.

It is an arithmetic number, because the mean of its divisors is an integer number (255977748045).

Almost surely, 2^{1023312212113} is an apocalyptic number.

It is an amenable number.

1023312212113 is a deficient number, since it is larger than the sum of its proper divisors (598780067).

1023312212113 is an equidigital number, since it uses as much as digits as its factorization.

1023312212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598780066.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1023312212113 its reverse (3112122133201), we get a palindrome (4135434345314).

The spelling of 1023312212113 in words is "one trillion, twenty-three billion, three hundred twelve million, two hundred twelve thousand, one hundred thirteen".