22303321981 has 2 divisors, whose sum is σ = 22303321982. Its totient is φ = 22303321980.

The previous prime is 22303321979. The next prime is 22303321987. The reversal of 22303321981 is 18912330322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22168529881 + 134792100 = 148891^2 + 11610^2 .

It is a cyclic number.

It is not a de Polignac number, because 22303321981 - 2¹ = 22303321979 is a prime.

It is a super-2 number, since 2×22303321981² (a number of 21 digits) contains 22 as substring.

Together with 22303321979, 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 (22303321987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11151660990 + 11151660991.

It is an arithmetic number, because the mean of its divisors is an integer number (11151660991).

Almost surely, 2^22303321981 is an apocalyptic number.

It is an amenable number.

22303321981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22303321981 is an equidigital number, since it uses as much as digits as its factorization.

22303321981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 22303321981 in words is "twenty-two billion, three hundred three million, three hundred twenty-one thousand, nine hundred eighty-one".