21023044001 has 2 divisors, whose sum is σ = 21023044002. Its totient is φ = 21023044000.

The previous prime is 21023043983. The next prime is 21023044069. The reversal of 21023044001 is 10044032012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14071653376 + 6951390625 = 118624^2 + 83375^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023044001 - 2¹⁰ = 21023042977 is a prime.

It is not a weakly prime, because it can be changed into another prime (21023041001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511522000 + 10511522001.

It is an arithmetic number, because the mean of its divisors is an integer number (10511522001).

Almost surely, 2^21023044001 is an apocalyptic number.

It is an amenable number.

21023044001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023044001 is an equidigital number, since it uses as much as digits as its factorization.

21023044001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21023044001 its reverse (10044032012), we get a palindrome (31067076013).

The spelling of 21023044001 in words is "twenty-one billion, twenty-three million, forty-four thousand, one".