20122001210281 has 2 divisors, whose sum is σ = 20122001210282. Its totient is φ = 20122001210280.

The previous prime is 20122001210279. The next prime is 20122001210299. The reversal of 20122001210281 is 18201210022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19926269293225 + 195731917056 = 4463885^2 + 442416^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122001210281 - 2¹ = 20122001210279 is a prime.

It is a super-2 number, since 2×20122001210281² (a number of 27 digits) contains 22 as substring.

Together with 20122001210279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20122001210581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061000605140 + 10061000605141.

It is an arithmetic number, because the mean of its divisors is an integer number (10061000605141).

Almost surely, 2^{20122001210281} is an apocalyptic number.

It is an amenable number.

20122001210281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122001210281 is an equidigital number, since it uses as much as digits as its factorization.

20122001210281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 20122001210281 its reverse (18201210022102), we get a palindrome (38323211232383).

The spelling of 20122001210281 in words is "twenty trillion, one hundred twenty-two billion, one million, two hundred ten thousand, two hundred eighty-one".