20423221303121 has 16 divisors (see below), whose sum is σ = 25140896169984. Its totient is φ = 16156059799104.

The previous prime is 20423221303097. The next prime is 20423221303123. The reversal of 20423221303121 is 12130312232402.

It is a cyclic number.

It is not a de Polignac number, because 20423221303121 - 2⁶ = 20423221303057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20423221303123) 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 15 ways as a sum of consecutive naturals, for example, 20144465 + ... + 21133998.

It is an arithmetic number, because the mean of its divisors is an integer number (1571306010624).

Almost surely, 2^{20423221303121} is an apocalyptic number.

It is an amenable number.

20423221303121 is a deficient number, since it is larger than the sum of its proper divisors (4717674866863).

20423221303121 is a wasteful number, since it uses less digits than its factorization.

20423221303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41283920.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 20423221303121 its reverse (12130312232402), we get a palindrome (32553533535523).

The spelling of 20423221303121 in words is "twenty trillion, four hundred twenty-three billion, two hundred twenty-one million, three hundred three thousand, one hundred twenty-one".