20323221121 has 16 divisors (see below), whose sum is σ = 23579562240. Its totient is φ = 17155676160.

The previous prime is 20323221067. The next prime is 20323221137. The reversal of 20323221121 is 12112232302.

It is not a de Polignac number, because 20323221121 - 2⁷ = 20323220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323221151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439705 + ... + 483721.

It is an arithmetic number, because the mean of its divisors is an integer number (1473722640).

Almost surely, 2^20323221121 is an apocalyptic number.

It is an amenable number.

20323221121 is a deficient number, since it is larger than the sum of its proper divisors (3256341119).

20323221121 is an equidigital number, since it uses as much as digits as its factorization.

20323221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45024.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20323221121 its reverse (12112232302), we get a palindrome (32435453423).

The spelling of 20323221121 in words is "twenty billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".