221222025322981 has 2 divisors, whose sum is σ = 221222025322982. Its totient is φ = 221222025322980.

The previous prime is 221222025322913. The next prime is 221222025323017. The reversal of 221222025322981 is 189223520222122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120056046226081 + 101165979096900 = 10957009^2 + 10058130^2 .

It is a cyclic number.

It is not a de Polignac number, because 221222025322981 - 2⁹ = 221222025322469 is a prime.

It is a super-2 number, since 2×221222025322981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222025322381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611012661490 + 110611012661491.

It is an arithmetic number, because the mean of its divisors is an integer number (110611012661491).

Almost surely, 2^{221222025322981} is an apocalyptic number.

It is an amenable number.

221222025322981 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222025322981 is an equidigital number, since it uses as much as digits as its factorization.

221222025322981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 221222025322981 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twenty-five million, three hundred twenty-two thousand, nine hundred eighty-one".