210001212013 has 4 divisors (see below), whose sum is σ = 210014326108. Its totient is φ = 209988097920.

The previous prime is 210001211999. The next prime is 210001212073. The reversal of 210001212013 is 310212100012.

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 109123194244 + 100878017769 = 330338^2 + 317613^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001212013 - 2²⁹ = 209464341101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210001211984 and 210001212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001212073) 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, 6532998 + ... + 6565063.

It is an arithmetic number, because the mean of its divisors is an integer number (52503581527).

Almost surely, 2^210001212013 is an apocalyptic number.

It is an amenable number.

210001212013 is a deficient number, since it is larger than the sum of its proper divisors (13114095).

210001212013 is a wasteful number, since it uses less digits than its factorization.

210001212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13114094.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210001212013 its reverse (310212100012), we get a palindrome (520213312025).

The spelling of 210001212013 in words is "two hundred ten billion, one million, two hundred twelve thousand, thirteen".