1312221130311 has 64 divisors (see below), whose sum is σ = 2237575725056. Its totient is φ = 665396208000.

The previous prime is 1312221130309. The next prime is 1312221130351. The reversal of 1312221130311 is 1130311222131.

It is not a de Polignac number, because 1312221130311 - 2¹ = 1312221130309 is a prime.

It is a super-3 number, since 3×1312221130311³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221130351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 764490 + ... + 1791336.

It is an arithmetic number, because the mean of its divisors is an integer number (34962120704).

Almost surely, 2^{1312221130311} is an apocalyptic number.

1312221130311 is a deficient number, since it is larger than the sum of its proper divisors (925354594745).

1312221130311 is a wasteful number, since it uses less digits than its factorization.

1312221130311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027052.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1312221130311 its reverse (1130311222131), we get a palindrome (2442532352442).

The spelling of 1312221130311 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, one hundred thirty thousand, three hundred eleven".