13122309991 has 48 divisors (see below), whose sum is σ = 16049988864. Its totient is φ = 10506114432.

The previous prime is 13122309943. The next prime is 13122310009. The reversal of 13122309991 is 19990322131.

It is not a de Polignac number, because 13122309991 - 2⁹ = 13122309479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122309091) 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, 56318811 + ... + 56319043.

It is an arithmetic number, because the mean of its divisors is an integer number (334374768).

Almost surely, 2^13122309991 is an apocalyptic number.

13122309991 is a deficient number, since it is larger than the sum of its proper divisors (2927678873).

13122309991 is a wasteful number, since it uses less digits than its factorization.

13122309991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

The spelling of 13122309991 in words is "thirteen billion, one hundred twenty-two million, three hundred nine thousand, nine hundred ninety-one".