1312102442221 has 4 divisors (see below), whose sum is σ = 1312109096992. Its totient is φ = 1312095787452.

The previous prime is 1312102442129. The next prime is 1312102442237. The reversal of 1312102442221 is 1222442012131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312102442221 - 2⁷ = 1312102442093 is a prime.

It is a super-2 number, since 2×1312102442221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312102442621) 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, 3022311 + ... + 3429076.

It is an arithmetic number, because the mean of its divisors is an integer number (328027274248).

Almost surely, 2^{1312102442221} is an apocalyptic number.

It is an amenable number.

1312102442221 is a deficient number, since it is larger than the sum of its proper divisors (6654771).

1312102442221 is an equidigital number, since it uses as much as digits as its factorization.

1312102442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654770.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1312102442221 its reverse (1222442012131), we get a palindrome (2534544454352).

The spelling of 1312102442221 in words is "one trillion, three hundred twelve billion, one hundred two million, four hundred forty-two thousand, two hundred twenty-one".