4224131209981 has 2 divisors, whose sum is σ = 4224131209982. Its totient is φ = 4224131209980.

The previous prime is 4224131209913. The next prime is 4224131210051. The reversal of 4224131209981 is 1899021314224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3910605125625 + 313526084356 = 1977525^2 + 559934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4224131209981 is a prime.

It is a super-2 number, since 2×4224131209981² (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 (4224131279981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2112065604990 + 2112065604991.

It is an arithmetic number, because the mean of its divisors is an integer number (2112065604991).

Almost surely, 2^{4224131209981} is an apocalyptic number.

It is an amenable number.

4224131209981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4224131209981 is an equidigital number, since it uses as much as digits as its factorization.

4224131209981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 4224131209981 in words is "four trillion, two hundred twenty-four billion, one hundred thirty-one million, two hundred nine thousand, nine hundred eighty-one".