21423233101 has 2 divisors, whose sum is σ = 21423233102. Its totient is φ = 21423233100.

The previous prime is 21423233057. The next prime is 21423233159. The reversal of 21423233101 is 10133232412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13288095076 + 8135138025 = 115274^2 + 90195^2 .

It is a cyclic number.

It is not a de Polignac number, because 21423233101 - 2⁷ = 21423232973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21423233401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711616550 + 10711616551.

It is an arithmetic number, because the mean of its divisors is an integer number (10711616551).

Almost surely, 2^21423233101 is an apocalyptic number.

It is an amenable number.

21423233101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423233101 is an equidigital number, since it uses as much as digits as its factorization.

21423233101 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21423233101 its reverse (10133232412), we get a palindrome (31556465513).

The spelling of 21423233101 in words is "twenty-one billion, four hundred twenty-three million, two hundred thirty-three thousand, one hundred one".