1001210013281 has 2 divisors, whose sum is σ = 1001210013282. Its totient is φ = 1001210013280.

The previous prime is 1001210013247. The next prime is 1001210013361. The reversal of 1001210013281 is 1823100121001.

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., 837151801600 + 164058211681 = 914960^2 + 405041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001210013281 is a prime.

It is a super-2 number, since 2×1001210013281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1001210013481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605006640 + 500605006641.

It is an arithmetic number, because the mean of its divisors is an integer number (500605006641).

Almost surely, 2^{1001210013281} is an apocalyptic number.

It is an amenable number.

1001210013281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001210013281 is an equidigital number, since it uses as much as digits as its factorization.

1001210013281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 1001210013281 its reverse (1823100121001), we get a palindrome (2824310134282).

The spelling of 1001210013281 in words is "one trillion, one billion, two hundred ten million, thirteen thousand, two hundred eighty-one".