2101203030281 has 2 divisors, whose sum is σ = 2101203030282. Its totient is φ = 2101203030280.

The previous prime is 2101203030263. The next prime is 2101203030341. The reversal of 2101203030281 is 1820303021012.

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., 1542603744256 + 558599286025 = 1242016^2 + 747395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101203030281 is a prime.

It is a super-2 number, since 2×2101203030281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101203030221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050601515140 + 1050601515141.

It is an arithmetic number, because the mean of its divisors is an integer number (1050601515141).

Almost surely, 2^{2101203030281} is an apocalyptic number.

It is an amenable number.

2101203030281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101203030281 is an equidigital number, since it uses as much as digits as its factorization.

2101203030281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 2101203030281 its reverse (1820303021012), we get a palindrome (3921506051293).

The spelling of 2101203030281 in words is "two trillion, one hundred one billion, two hundred three million, thirty thousand, two hundred eighty-one".