210001212313 has 4 divisors (see below), whose sum is σ = 222354224820. Its totient is φ = 197648199808.

The previous prime is 210001212301. The next prime is 210001212389. The reversal of 210001212313 is 313212100012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180274969744 + 29726242569 = 424588^2 + 172413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210001212313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210001212913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6176506228 + ... + 6176506261.

It is an arithmetic number, because the mean of its divisors is an integer number (55588556205).

Almost surely, 2^210001212313 is an apocalyptic number.

It is an amenable number.

210001212313 is a deficient number, since it is larger than the sum of its proper divisors (12353012507).

210001212313 is a wasteful number, since it uses less digits than its factorization.

210001212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12353012506.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 210001212313 its reverse (313212100012), we get a palindrome (523213312325).

The spelling of 210001212313 in words is "two hundred ten billion, one million, two hundred twelve thousand, three hundred thirteen".