20010110112281 has 2 divisors, whose sum is σ = 20010110112282. Its totient is φ = 20010110112280.

The previous prime is 20010110112259. The next prime is 20010110112313. The reversal of 20010110112281 is 18221101101002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18964143686656 + 1045966425625 = 4354784^2 + 1022725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010110112281 is a prime.

It is a super-2 number, since 2×20010110112281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20010110312281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005055056140 + 10005055056141.

It is an arithmetic number, because the mean of its divisors is an integer number (10005055056141).

Almost surely, 2^{20010110112281} is an apocalyptic number.

It is an amenable number.

20010110112281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010110112281 is an equidigital number, since it uses as much as digits as its factorization.

20010110112281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 20010110112281 its reverse (18221101101002), we get a palindrome (38231211213283).

The spelling of 20010110112281 in words is "twenty trillion, ten billion, one hundred ten million, one hundred twelve thousand, two hundred eighty-one".