21302322020123 has 2 divisors, whose sum is σ = 21302322020124. Its totient is φ = 21302322020122.

The previous prime is 21302322020117. The next prime is 21302322020131. The reversal of 21302322020123 is 32102022320312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21302322020123 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302322025123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651161010061 + 10651161010062.

It is an arithmetic number, because the mean of its divisors is an integer number (10651161010062).

Almost surely, 2^{21302322020123} is an apocalyptic number.

21302322020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302322020123 is an equidigital number, since it uses as much as digits as its factorization.

21302322020123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21302322020123 its reverse (32102022320312), we get a palindrome (53404344340435).

The spelling of 21302322020123 in words is "twenty-one trillion, three hundred two billion, three hundred twenty-two million, twenty thousand, one hundred twenty-three".