13220021043021 has 8 divisors (see below), whose sum is σ = 18982594318240. Its totient is φ = 8135397564912.

The previous prime is 13220021043013. The next prime is 13220021043049. The reversal of 13220021043021 is 12034012002231.

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

It is not a de Polignac number, because 13220021043021 - 2³ = 13220021043013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220021043091) 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, 169487449231 + ... + 169487449308.

It is an arithmetic number, because the mean of its divisors is an integer number (2372824289780).

Almost surely, 2^{13220021043021} is an apocalyptic number.

It is an amenable number.

13220021043021 is a deficient number, since it is larger than the sum of its proper divisors (5762573275219).

13220021043021 is a wasteful number, since it uses less digits than its factorization.

13220021043021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338974898555.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 13220021043021 its reverse (12034012002231), we get a palindrome (25254033045252).

The spelling of 13220021043021 in words is "thirteen trillion, two hundred twenty billion, twenty-one million, forty-three thousand, twenty-one".