212100202111201 has 4 divisors (see below), whose sum is σ = 214200204112404. Its totient is φ = 210000200110000.

The previous prime is 212100202111157. The next prime is 212100202111223. The reversal of 212100202111201 is 102111202001212.

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 140433141501601 + 71667060609600 = 11850449^2 + 8465640^2 .

It is a cyclic number.

It is not a de Polignac number, because 212100202111201 - 2³⁹ = 211550446297313 is a prime.

It is a super-2 number, since 2×212100202111201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212100202111801) 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, 1050001000450 + ... + 1050001000651.

It is an arithmetic number, because the mean of its divisors is an integer number (53550051028101).

Almost surely, 2^{212100202111201} is an apocalyptic number.

It is an amenable number.

212100202111201 is a deficient number, since it is larger than the sum of its proper divisors (2100002001203).

212100202111201 is a wasteful number, since it uses less digits than its factorization.

212100202111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100002001202.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212100202111201 its reverse (102111202001212), we get a palindrome (314211404112413).

The spelling of 212100202111201 in words is "two hundred twelve trillion, one hundred billion, two hundred two million, one hundred eleven thousand, two hundred one".