20023313213221 has 4 divisors (see below), whose sum is σ = 20023452594432. Its totient is φ = 20023173832012.

The previous prime is 20023313213219. The next prime is 20023313213269. The reversal of 20023313213221 is 12231231332002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20023313213221 - 2¹ = 20023313213219 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 (20023313217221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69474895 + ... + 69762508.

It is an arithmetic number, because the mean of its divisors is an integer number (5005863148608).

Almost surely, 2^{20023313213221} is an apocalyptic number.

It is an amenable number.

20023313213221 is a deficient number, since it is larger than the sum of its proper divisors (139381211).

20023313213221 is a wasteful number, since it uses less digits than its factorization.

20023313213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139381210.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 20023313213221 its reverse (12231231332002), we get a palindrome (32254544545223).

The spelling of 20023313213221 in words is "twenty trillion, twenty-three billion, three hundred thirteen million, two hundred thirteen thousand, two hundred twenty-one".