21403022233 has 2 divisors, whose sum is σ = 21403022234. Its totient is φ = 21403022232.

The previous prime is 21403022213. The next prime is 21403022239. The reversal of 21403022233 is 33222030412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20541482329 + 861539904 = 143323^2 + 29352^2 .

It is a cyclic number.

It is not a de Polignac number, because 21403022233 - 2²⁹ = 20866151321 is a prime.

It is not a weakly prime, because it can be changed into another prime (21403022239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701511116 + 10701511117.

It is an arithmetic number, because the mean of its divisors is an integer number (10701511117).

Almost surely, 2^21403022233 is an apocalyptic number.

It is an amenable number.

21403022233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403022233 is an equidigital number, since it uses as much as digits as its factorization.

21403022233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21403022233 its reverse (33222030412), we get a palindrome (54625052645).

The spelling of 21403022233 in words is "twenty-one billion, four hundred three million, twenty-two thousand, two hundred thirty-three".