12200221220981 has 2 divisors, whose sum is σ = 12200221220982. Its totient is φ = 12200221220980.

The previous prime is 12200221220977. The next prime is 12200221221017. The reversal of 12200221220981 is 18902212200221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11483897664100 + 716323556881 = 3388790^2 + 846359^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200221220981 - 2² = 12200221220977 is a prime.

It is a super-2 number, since 2×12200221220981² (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 (12200221220081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100110610490 + 6100110610491.

It is an arithmetic number, because the mean of its divisors is an integer number (6100110610491).

Almost surely, 2^{12200221220981} is an apocalyptic number.

It is an amenable number.

12200221220981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200221220981 is an equidigital number, since it uses as much as digits as its factorization.

12200221220981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 12200221220981 in words is "twelve trillion, two hundred billion, two hundred twenty-one million, two hundred twenty thousand, nine hundred eighty-one".