1312221320011 has 6 divisors (see below), whose sum is σ = 1526461535580. Its totient is φ = 1124761131396.

The previous prime is 1312221319993. The next prime is 1312221320027. The reversal of 1312221320011 is 1100231222131.

It is not a de Polignac number, because 1312221320011 - 2¹⁹ = 1312220795723 is a prime.

It is a super-2 number, since 2×1312221320011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312222320011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13390013421 + ... + 13390013518.

It is an arithmetic number, because the mean of its divisors is an integer number (254410255930).

Almost surely, 2^{1312221320011} is an apocalyptic number.

1312221320011 is a deficient number, since it is larger than the sum of its proper divisors (214240215569).

1312221320011 is an equidigital number, since it uses as much as digits as its factorization.

1312221320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26780026953 (or 26780026946 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1312221320011 its reverse (1100231222131), we get a palindrome (2412452542142).

The spelling of 1312221320011 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, three hundred twenty thousand, eleven".