2221301210981 has 2 divisors, whose sum is σ = 2221301210982. Its totient is φ = 2221301210980.

The previous prime is 2221301210977. The next prime is 2221301211043. The reversal of 2221301210981 is 1890121031222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1373898113956 + 847403097025 = 1172134^2 + 920545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221301210981 - 2² = 2221301210977 is a prime.

It is a super-2 number, since 2×2221301210981² (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 (2221301210911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110650605490 + 1110650605491.

It is an arithmetic number, because the mean of its divisors is an integer number (1110650605491).

Almost surely, 2^{2221301210981} is an apocalyptic number.

It is an amenable number.

2221301210981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221301210981 is an equidigital number, since it uses as much as digits as its factorization.

2221301210981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 2221301210981 in words is "two trillion, two hundred twenty-one billion, three hundred one million, two hundred ten thousand, nine hundred eighty-one".