13021611221 has 8 divisors (see below), whose sum is σ = 13708447200. Its totient is φ = 12334924080.

The previous prime is 13021611203. The next prime is 13021611263. The reversal of 13021611221 is 12211612031.

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 13021611221 - 2⁶ = 13021611157 is a prime.

It is a super-2 number, since 2×13021611221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021611193 and 13021611202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021610221) 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, 172835 + ... + 236463.

It is an arithmetic number, because the mean of its divisors is an integer number (1713555900).

Almost surely, 2^13021611221 is an apocalyptic number.

It is an amenable number.

13021611221 is a deficient number, since it is larger than the sum of its proper divisors (686835979).

13021611221 is a wasteful number, since it uses less digits than its factorization.

13021611221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74419.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 13021611221 in words is "thirteen billion, twenty-one million, six hundred eleven thousand, two hundred twenty-one".