20320121023 has 2 divisors, whose sum is σ = 20320121024. Its totient is φ = 20320121022.

The previous prime is 20320120981. The next prime is 20320121027. The reversal of 20320121023 is 32012102302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20320121023 - 2⁹ = 20320120511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20320120988 and 20320121006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160060511 + 10160060512.

It is an arithmetic number, because the mean of its divisors is an integer number (10160060512).

Almost surely, 2^20320121023 is an apocalyptic number.

20320121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320121023 is an equidigital number, since it uses as much as digits as its factorization.

20320121023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20320121023 its reverse (32012102302), we get a palindrome (52332223325).

The spelling of 20320121023 in words is "twenty billion, three hundred twenty million, one hundred twenty-one thousand, twenty-three".