21221002002023 has 2 divisors, whose sum is σ = 21221002002024. Its totient is φ = 21221002002022.

The previous prime is 21221002002007. The next prime is 21221002002029. The reversal of 21221002002023 is 32020020012212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221002002023 - 2⁴ = 21221002002007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221002001992 and 21221002002010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221002002029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610501001011 + 10610501001012.

It is an arithmetic number, because the mean of its divisors is an integer number (10610501001012).

Almost surely, 2^{21221002002023} is an apocalyptic number.

21221002002023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221002002023 is an equidigital number, since it uses as much as digits as its factorization.

21221002002023 is an evil number, because the sum of its binary digits is even.

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

Adding to 21221002002023 its reverse (32020020012212), we get a palindrome (53241022014235).

The spelling of 21221002002023 in words is "twenty-one trillion, two hundred twenty-one billion, two million, two thousand, twenty-three".