13122021311 has 4 divisors (see below), whose sum is σ = 14996595792. Its totient is φ = 11247446832.

The previous prime is 13122021299. The next prime is 13122021317. The reversal of 13122021311 is 11312022131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11312022131 = 107 ⋅105719833.

It is a cyclic number.

It is not a de Polignac number, because 13122021311 - 2²² = 13117827007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13122021311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122021317) 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, 937287230 + ... + 937287243.

It is an arithmetic number, because the mean of its divisors is an integer number (3749148948).

Almost surely, 2^13122021311 is an apocalyptic number.

13122021311 is a deficient number, since it is larger than the sum of its proper divisors (1874574481).

13122021311 is an equidigital number, since it uses as much as digits as its factorization.

13122021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874574480.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13122021311 its reverse (11312022131), we get a palindrome (24434043442).

The spelling of 13122021311 in words is "thirteen billion, one hundred twenty-two million, twenty-one thousand, three hundred eleven".