21222042415001 has 2 divisors, whose sum is σ = 21222042415002. Its totient is φ = 21222042415000.

The previous prime is 21222042414983. The next prime is 21222042415037. The reversal of 21222042415001 is 10051424022212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21215236000000 + 6806415001 = 4606000^2 + 82501^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222042415001 - 2¹⁴ = 21222042398617 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222042415201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611021207500 + 10611021207501.

It is an arithmetic number, because the mean of its divisors is an integer number (10611021207501).

Almost surely, 2^{21222042415001} is an apocalyptic number.

It is an amenable number.

21222042415001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222042415001 is an equidigital number, since it uses as much as digits as its factorization.

21222042415001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 21222042415001 its reverse (10051424022212), we get a palindrome (31273466437213).

The spelling of 21222042415001 in words is "twenty-one trillion, two hundred twenty-two billion, forty-two million, four hundred fifteen thousand, one".