21010133323 has 2 divisors, whose sum is σ = 21010133324. Its totient is φ = 21010133322.

The previous prime is 21010133267. The next prime is 21010133351. The reversal of 21010133323 is 32333101012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010133323 - 2⁹ = 21010132811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21010133323.

It is not a weakly prime, because it can be changed into another prime (21010163323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505066661 + 10505066662.

It is an arithmetic number, because the mean of its divisors is an integer number (10505066662).

Almost surely, 2^21010133323 is an apocalyptic number.

21010133323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010133323 is an equidigital number, since it uses as much as digits as its factorization.

21010133323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21010133323 its reverse (32333101012), we get a palindrome (53343234335).

The spelling of 21010133323 in words is "twenty-one billion, ten million, one hundred thirty-three thousand, three hundred twenty-three".