2111012102281 has 2 divisors, whose sum is σ = 2111012102282. Its totient is φ = 2111012102280.

The previous prime is 2111012102267. The next prime is 2111012102317. The reversal of 2111012102281 is 1822012101112.

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., 2097546820681 + 13465281600 = 1448291^2 + 116040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111012102281 - 2¹⁵ = 2111012069513 is a prime.

It is a super-2 number, since 2×2111012102281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2111012102681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055506051140 + 1055506051141.

It is an arithmetic number, because the mean of its divisors is an integer number (1055506051141).

Almost surely, 2^{2111012102281} is an apocalyptic number.

It is an amenable number.

2111012102281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111012102281 is an equidigital number, since it uses as much as digits as its factorization.

2111012102281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 2111012102281 its reverse (1822012101112), we get a palindrome (3933024203393).

The spelling of 2111012102281 in words is "two trillion, one hundred eleven billion, twelve million, one hundred two thousand, two hundred eighty-one".