20002112281 has 2 divisors, whose sum is σ = 20002112282. Its totient is φ = 20002112280.

The previous prime is 20002112239. The next prime is 20002112293. The reversal of 20002112281 is 18221120002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18064704025 + 1937408256 = 134405^2 + 44016^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002112281 - 2⁷ = 20002112153 is a prime.

It is a super-2 number, since 2×20002112281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20002112381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001056140 + 10001056141.

It is an arithmetic number, because the mean of its divisors is an integer number (10001056141).

Almost surely, 2^20002112281 is an apocalyptic number.

It is an amenable number.

20002112281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002112281 is an equidigital number, since it uses as much as digits as its factorization.

20002112281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20002112281 its reverse (18221120002), we get a palindrome (38223232283).

The spelling of 20002112281 in words is "twenty billion, two million, one hundred twelve thousand, two hundred eighty-one".