220000002199981 has 2 divisors, whose sum is σ = 220000002199982. Its totient is φ = 220000002199980.

The previous prime is 220000002199973. The next prime is 220000002200021. The reversal of 220000002199981 is 189991200000022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115062822306756 + 104937179893225 = 10726734^2 + 10243885^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000002199981 - 2³ = 220000002199973 is a prime.

It is a super-2 number, since 2×220000002199981² (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 (220000002199961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000001099990 + 110000001099991.

It is an arithmetic number, because the mean of its divisors is an integer number (110000001099991).

Almost surely, 2^{220000002199981} is an apocalyptic number.

It is an amenable number.

220000002199981 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000002199981 is an equidigital number, since it uses as much as digits as its factorization.

220000002199981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The spelling of 220000002199981 in words is "two hundred twenty trillion, two million, one hundred ninety-nine thousand, nine hundred eighty-one".