2101001012281 has 2 divisors, whose sum is σ = 2101001012282. Its totient is φ = 2101001012280.

The previous prime is 2101001012233. The next prime is 2101001012309. The reversal of 2101001012281 is 1822101001012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1969292989225 + 131708023056 = 1403315^2 + 362916^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101001012281 - 2¹⁵ = 2101000979513 is a prime.

It is a super-4 number, since 4×2101001012281⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2101001012081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050500506140 + 1050500506141.

It is an arithmetic number, because the mean of its divisors is an integer number (1050500506141).

Almost surely, 2^{2101001012281} is an apocalyptic number.

It is an amenable number.

2101001012281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101001012281 is an equidigital number, since it uses as much as digits as its factorization.

2101001012281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 2101001012281 its reverse (1822101001012), we get a palindrome (3923102013293).

The spelling of 2101001012281 in words is "two trillion, one hundred one billion, one million, twelve thousand, two hundred eighty-one".