22230100320721 has 2 divisors, whose sum is σ = 22230100320722. Its totient is φ = 22230100320720.

The previous prime is 22230100320719. The next prime is 22230100320781. The reversal of 22230100320721 is 12702300103222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20141569540096 + 2088530780625 = 4487936^2 + 1445175^2 .

It is a cyclic number.

It is not a de Polignac number, because 22230100320721 - 2¹ = 22230100320719 is a prime.

Together with 22230100320719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22230100320781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115050160360 + 11115050160361.

It is an arithmetic number, because the mean of its divisors is an integer number (11115050160361).

Almost surely, 2^{22230100320721} is an apocalyptic number.

It is an amenable number.

22230100320721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22230100320721 is an equidigital number, since it uses as much as digits as its factorization.

22230100320721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 22230100320721 its reverse (12702300103222), we get a palindrome (34932400423943).

The spelling of 22230100320721 in words is "twenty-two trillion, two hundred thirty billion, one hundred million, three hundred twenty thousand, seven hundred twenty-one".