12220322329981 has 2 divisors, whose sum is σ = 12220322329982. Its totient is φ = 12220322329980.

The previous prime is 12220322329939. The next prime is 12220322330003. The reversal of 12220322329981 is 18992322302221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8489263085956 + 3731059244025 = 2913634^2 + 1931595^2 .

It is an emirp because it is prime and its reverse (18992322302221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12220322329981 - 2⁹ = 12220322329469 is a prime.

It is a super-2 number, since 2×12220322329981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220322329781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110161164990 + 6110161164991.

It is an arithmetic number, because the mean of its divisors is an integer number (6110161164991).

Almost surely, 2^{12220322329981} is an apocalyptic number.

It is an amenable number.

12220322329981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220322329981 is an equidigital number, since it uses as much as digits as its factorization.

12220322329981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 12220322329981 in words is "twelve trillion, two hundred twenty billion, three hundred twenty-two million, three hundred twenty-nine thousand, nine hundred eighty-one".