212100010001213 has 4 divisors (see below), whose sum is σ = 212925301869180. Its totient is φ = 211274718133248.

The previous prime is 212100010001177. The next prime is 212100010001329. The reversal of 212100010001213 is 312100010001212.

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 102831727797604 + 109268282203609 = 10140598^2 + 10453147^2 .

It is a cyclic number.

It is not a de Polignac number, because 212100010001213 - 2⁶ = 212100010001149 is a prime.

It is a super-2 number, since 2×212100010001213² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100010009213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412645933598 + ... + 412645934111.

It is an arithmetic number, because the mean of its divisors is an integer number (53231325467295).

Almost surely, 2^{212100010001213} is an apocalyptic number.

It is an amenable number.

212100010001213 is a deficient number, since it is larger than the sum of its proper divisors (825291867967).

212100010001213 is an equidigital number, since it uses as much as digits as its factorization.

212100010001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825291867966.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212100010001213 its reverse (312100010001212), we get a palindrome (524200020002425).

Subtracting 212100010001213 from its reverse (312100010001212), we obtain a palindrome (99999999999999).

The spelling of 212100010001213 in words is "two hundred twelve trillion, one hundred billion, ten million, one thousand, two hundred thirteen".