22222221119981 has 2 divisors, whose sum is σ = 22222221119982. Its totient is φ = 22222221119980.

The previous prime is 22222221119951. The next prime is 22222221120053. The reversal of 22222221119981 is 18991112222222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22219203375625 + 3017744356 = 4713725^2 + 54934^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222221119981 - 2³⁴ = 22205041250797 is a prime.

It is a super-2 number, since 2×22222221119981² (a number of 27 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 (22222221119951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11111110559990 + 11111110559991.

It is an arithmetic number, because the mean of its divisors is an integer number (11111110559991).

Almost surely, 2^{22222221119981} is an apocalyptic number.

It is an amenable number.

22222221119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222221119981 is an equidigital number, since it uses as much as digits as its factorization.

22222221119981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 44.

The spelling of 22222221119981 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred nineteen thousand, nine hundred eighty-one".