21202122023 has 2 divisors, whose sum is σ = 21202122024. Its totient is φ = 21202122022.

The previous prime is 21202121987. The next prime is 21202122037. The reversal of 21202122023 is 32022120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202122023 - 2¹⁸ = 21201859879 is a prime.

It is a super-2 number, since 2×21202122023² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202121992 and 21202122010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202122083) 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 as a sum of consecutive naturals, namely, 10601061011 + 10601061012.

It is an arithmetic number, because the mean of its divisors is an integer number (10601061012).

Almost surely, 2^21202122023 is an apocalyptic number.

21202122023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202122023 is an equidigital number, since it uses as much as digits as its factorization.

21202122023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21202122023 its reverse (32022120212), we get a palindrome (53224242235).

The spelling of 21202122023 in words is "twenty-one billion, two hundred two million, one hundred twenty-two thousand, twenty-three".