21221110122323 has 2 divisors, whose sum is σ = 21221110122324. Its totient is φ = 21221110122322.

The previous prime is 21221110122221. The next prime is 21221110122349. The reversal of 21221110122323 is 32322101112212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221110122323 - 2⁴² = 16823063611219 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21221110122523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610555061161 + 10610555061162.

It is an arithmetic number, because the mean of its divisors is an integer number (10610555061162).

Almost surely, 2^{21221110122323} is an apocalyptic number.

21221110122323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221110122323 is an equidigital number, since it uses as much as digits as its factorization.

21221110122323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21221110122323 its reverse (32322101112212), we get a palindrome (53543211234535).

The spelling of 21221110122323 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty-two thousand, three hundred twenty-three".