1222301111981 has 2 divisors, whose sum is σ = 1222301111982. Its totient is φ = 1222301111980.

The previous prime is 1222301111971. The next prime is 1222301112037. The reversal of 1222301111981 is 1891111032221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 953925309481 + 268375802500 = 976691^2 + 518050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222301111981 is a prime.

It is a super-2 number, since 2×1222301111981² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222301111971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611150555990 + 611150555991.

It is an arithmetic number, because the mean of its divisors is an integer number (611150555991).

Almost surely, 2^{1222301111981} is an apocalyptic number.

It is an amenable number.

1222301111981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222301111981 is an equidigital number, since it uses as much as digits as its factorization.

1222301111981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 32.

The spelling of 1222301111981 in words is "one trillion, two hundred twenty-two billion, three hundred one million, one hundred eleven thousand, nine hundred eighty-one".