13221811757 has 24 divisors (see below), whose sum is σ = 17008595712. Its totient is φ = 10161547200.

The previous prime is 13221811753. The next prime is 13221811769. The reversal of 13221811757 is 75711812231.

It is a happy number.

It is not a de Polignac number, because 13221811757 - 2² = 13221811753 is a prime.

It is a super-2 number, since 2×13221811757² (a number of 21 digits) contains 22 as substring.

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 13221811757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221811753) 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, 128669 + ... + 207362.

It is an arithmetic number, because the mean of its divisors is an integer number (708691488).

Almost surely, 2^13221811757 is an apocalyptic number.

It is an amenable number.

13221811757 is a deficient number, since it is larger than the sum of its proper divisors (3786783955).

13221811757 is a wasteful number, since it uses less digits than its factorization.

13221811757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336129 (or 336122 counting only the distinct ones).

The product of its digits is 23520, while the sum is 38.

The spelling of 13221811757 in words is "thirteen billion, two hundred twenty-one million, eight hundred eleven thousand, seven hundred fifty-seven".