20332113123221 has 4 divisors (see below), whose sum is σ = 20492208502272. Its totient is φ = 20172017744172.

The previous prime is 20332113123173. The next prime is 20332113123227. The reversal of 20332113123221 is 12232131123302.

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 a de Polignac number, because none of the positive numbers 2^k-20332113123221 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 (20332113123227) 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, 80047689335 + ... + 80047689588.

It is an arithmetic number, because the mean of its divisors is an integer number (5123052125568).

Almost surely, 2^{20332113123221} is an apocalyptic number.

It is an amenable number.

20332113123221 is a deficient number, since it is larger than the sum of its proper divisors (160095379051).

20332113123221 is a wasteful number, since it uses less digits than its factorization.

20332113123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160095379050.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20332113123221 its reverse (12232131123302), we get a palindrome (32564244246523).

The spelling of 20332113123221 in words is "twenty trillion, three hundred thirty-two billion, one hundred thirteen million, one hundred twenty-three thousand, two hundred twenty-one".