211212121112201 has 32 divisors (see below), whose sum is σ = 238833048115200. Its totient is φ = 185111989433280.

The previous prime is 211212121112197. The next prime is 211212121112219. The reversal of 211212121112201 is 102211121212112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211212121112201 - 2² = 211212121112197 is a prime.

It is a super-2 number, since 2×211212121112201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212121112281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115264970 + ... + 117083036.

It is an arithmetic number, because the mean of its divisors is an integer number (7463532753600).

Almost surely, 2^{211212121112201} is an apocalyptic number.

It is an amenable number.

211212121112201 is a deficient number, since it is larger than the sum of its proper divisors (27620927002999).

211212121112201 is a wasteful number, since it uses less digits than its factorization.

211212121112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821309.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211212121112201 its reverse (102211121212112), we get a palindrome (313423242324313).

The spelling of 211212121112201 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, two hundred one".