13021312122 has 48 divisors (see below), whose sum is σ = 34723503360. Its totient is φ = 3434191776.

The previous prime is 13021312121. The next prime is 13021312151. The reversal of 13021312122 is 22121312031.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13021312095 and 13021312104.

It is not an unprimeable number, because it can be changed into a prime (13021312121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3973122 + ... + 3976397.

It is an arithmetic number, because the mean of its divisors is an integer number (723406320).

Almost surely, 2^13021312122 is an apocalyptic number.

13021312122 is an abundant number, since it is smaller than the sum of its proper divisors (21702191238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13021312122 is a wasteful number, since it uses less digits than its factorization.

13021312122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7949547 (or 7949544 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13021312122 its reverse (22121312031), we get a palindrome (35142624153).

Subtracting 13021312122 from its reverse (22121312031), we obtain a palindrome (9099999909).

The spelling of 13021312122 in words is "thirteen billion, twenty-one million, three hundred twelve thousand, one hundred twenty-two".