13221811641 has 8 divisors (see below), whose sum is σ = 17689250880. Its totient is φ = 8784456752.

The previous prime is 13221811619. The next prime is 13221811663. The reversal of 13221811641 is 14611812231.

It is an interprime number because it is at equal distance from previous prime (13221811619) and next prime (13221811663).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13221811641 - 2⁷ = 13221811513 is a prime.

It is a super-2 number, since 2×13221811641² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13221811599 and 13221811608.

It is not an unprimeable number, because it can be changed into a prime (13221811541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7520061 + ... + 7521818.

It is an arithmetic number, because the mean of its divisors is an integer number (2211156360).

Almost surely, 2^13221811641 is an apocalyptic number.

It is an amenable number.

13221811641 is a deficient number, since it is larger than the sum of its proper divisors (4467439239).

13221811641 is a wasteful number, since it uses less digits than its factorization.

13221811641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15042175.

The product of its digits is 2304, while the sum is 30.

The spelling of 13221811641 in words is "thirteen billion, two hundred twenty-one million, eight hundred eleven thousand, six hundred forty-one".