1311222321321 has 32 divisors (see below), whose sum is σ = 1926321094656. Its totient is φ = 786728280000.

The previous prime is 1311222321317. The next prime is 1311222321371. The reversal of 1311222321321 is 1231232221131.

It is not a de Polignac number, because 1311222321321 - 2² = 1311222321317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311222321291 and 1311222321300.

It is not an unprimeable number, because it can be changed into a prime (1311222321371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47338086 + ... + 47365776.

It is an arithmetic number, because the mean of its divisors is an integer number (60197534208).

Almost surely, 2^{1311222321321} is an apocalyptic number.

1311222321321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1311222321321 is a deficient number, since it is larger than the sum of its proper divisors (615098773335).

1311222321321 is a wasteful number, since it uses less digits than its factorization.

1311222321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42013.

The product of its digits is 864, while the sum is 24.

Adding to 1311222321321 its reverse (1231232221131), we get a palindrome (2542454542452).

The spelling of 1311222321321 in words is "one trillion, three hundred eleven billion, two hundred twenty-two million, three hundred twenty-one thousand, three hundred twenty-one".