21213213020023 has 2 divisors, whose sum is σ = 21213213020024. Its totient is φ = 21213213020022.

The previous prime is 21213213020011. The next prime is 21213213020053. The reversal of 21213213020023 is 32002031231212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21213213020023 - 2¹³ = 21213213011831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213213019976 and 21213213020003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213213020053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606606510011 + 10606606510012.

It is an arithmetic number, because the mean of its divisors is an integer number (10606606510012).

Almost surely, 2^{21213213020023} is an apocalyptic number.

21213213020023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213213020023 is an equidigital number, since it uses as much as digits as its factorization.

21213213020023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21213213020023 its reverse (32002031231212), we get a palindrome (53215244251235).

The spelling of 21213213020023 in words is "twenty-one trillion, two hundred thirteen billion, two hundred thirteen million, twenty thousand, twenty-three".