1312220221311 has 48 divisors (see below), whose sum is σ = 1866331611648. Its totient is φ = 819936384000.

The previous prime is 1312220221307. The next prime is 1312220221331. The reversal of 1312220221311 is 1131220222131.

It is not a de Polignac number, because 1312220221311 - 2² = 1312220221307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312220221331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 224576956 + ... + 224582798.

It is an arithmetic number, because the mean of its divisors is an integer number (38881908576).

Almost surely, 2^{1312220221311} is an apocalyptic number.

1312220221311 is a deficient number, since it is larger than the sum of its proper divisors (554111390337).

1312220221311 is a wasteful number, since it uses less digits than its factorization.

1312220221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912 (or 6895 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1312220221311 its reverse (1131220222131), we get a palindrome (2443440443442).

The spelling of 1312220221311 in words is "one trillion, three hundred twelve billion, two hundred twenty million, two hundred twenty-one thousand, three hundred eleven".