212101110112211 has 4 divisors (see below), whose sum is σ = 212101199587800. Its totient is φ = 212101020636624.

The previous prime is 212101110112207. The next prime is 212101110112217. The reversal of 212101110112211 is 112211011101212.

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

It is a cyclic number.

It is not a de Polignac number, because 212101110112211 - 2² = 212101110112207 is a prime.

It is a super-2 number, since 2×212101110112211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212101110112211.

It is not an unprimeable number, because it can be changed into a prime (212101110112217) 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, 41082506 + ... + 45956223.

It is an arithmetic number, because the mean of its divisors is an integer number (53025299896950).

Almost surely, 2^{212101110112211} is an apocalyptic number.

212101110112211 is a deficient number, since it is larger than the sum of its proper divisors (89475589).

212101110112211 is an equidigital number, since it uses as much as digits as its factorization.

212101110112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89475588.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 212101110112211 its reverse (112211011101212), we get a palindrome (324312121213423).

The spelling of 212101110112211 in words is "two hundred twelve trillion, one hundred one billion, one hundred ten million, one hundred twelve thousand, two hundred eleven".