4220444413981 has 2 divisors, whose sum is σ = 4220444413982. Its totient is φ = 4220444413980.

The previous prime is 4220444413951. The next prime is 4220444414051. The reversal of 4220444413981 is 1893144440224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4130105094756 + 90339319225 = 2032266^2 + 300565^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220444413981 - 2⁵ = 4220444413949 is a prime.

It is a super-2 number, since 2×4220444413981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4220444413951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110222206990 + 2110222206991.

It is an arithmetic number, because the mean of its divisors is an integer number (2110222206991).

Almost surely, 2^{4220444413981} is an apocalyptic number.

It is an amenable number.

4220444413981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4220444413981 is an equidigital number, since it uses as much as digits as its factorization.

4220444413981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 4220444413981 in words is "four trillion, two hundred twenty billion, four hundred forty-four million, four hundred thirteen thousand, nine hundred eighty-one".