22321210997 has 2 divisors, whose sum is σ = 22321210998. Its totient is φ = 22321210996.

The previous prime is 22321210979. The next prime is 22321211047. The reversal of 22321210997 is 79901212322.

Together with previous prime (22321210979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11210786161 + 11110424836 = 105881^2 + 105406^2 .

It is a cyclic number.

It is not a de Polignac number, because 22321210997 - 2²² = 22317016693 is a prime.

It is a super-3 number, since 3×22321210997³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22321210997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22321210297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11160605498 + 11160605499.

It is an arithmetic number, because the mean of its divisors is an integer number (11160605499).

Almost surely, 2^22321210997 is an apocalyptic number.

It is an amenable number.

22321210997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22321210997 is an equidigital number, since it uses as much as digits as its factorization.

22321210997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 22321210997 in words is "twenty-two billion, three hundred twenty-one million, two hundred ten thousand, nine hundred ninety-seven".