13220312021 has 8 divisors (see below), whose sum is σ = 15997688640. Its totient is φ = 10665125568.

The previous prime is 13220312003. The next prime is 13220312029. The reversal of 13220312021 is 12021302231.

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 13220312021 - 2⁶ = 13220311957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220312029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55547411 + ... + 55547648.

It is an arithmetic number, because the mean of its divisors is an integer number (1999711080).

Almost surely, 2^13220312021 is an apocalyptic number.

It is an amenable number.

13220312021 is a deficient number, since it is larger than the sum of its proper divisors (2777376619).

13220312021 is a wasteful number, since it uses less digits than its factorization.

13220312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111095083.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13220312021 its reverse (12021302231), we get a palindrome (25241614252).

The spelling of 13220312021 in words is "thirteen billion, two hundred twenty million, three hundred twelve thousand, twenty-one".