22010321320021 has 2 divisors, whose sum is σ = 22010321320022. Its totient is φ = 22010321320020.

The previous prime is 22010321320019. The next prime is 22010321320033. The reversal of 22010321320021 is 12002312301022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21906612202500 + 103709117521 = 4680450^2 + 322039^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010321320021 - 2¹ = 22010321320019 is a prime.

It is a super-2 number, since 2×22010321320021² (a number of 27 digits) contains 22 as substring.

Together with 22010321320019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22010321350021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005160660010 + 11005160660011.

It is an arithmetic number, because the mean of its divisors is an integer number (11005160660011).

Almost surely, 2^{22010321320021} is an apocalyptic number.

It is an amenable number.

22010321320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22010321320021 is an equidigital number, since it uses as much as digits as its factorization.

22010321320021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22010321320021 its reverse (12002312301022), we get a palindrome (34012633621043).

The spelling of 22010321320021 in words is "twenty-two trillion, ten billion, three hundred twenty-one million, three hundred twenty thousand, twenty-one".