211201202221111 has 4 divisors (see below), whose sum is σ = 211256302982112. Its totient is φ = 211146101460112.

The previous prime is 211201202221007. The next prime is 211201202221147. The reversal of 211201202221111 is 111122202102112.

It is a happy number.

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 211201202221111 - 2²⁵ = 211201168666679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201202221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27550374751 + ... + 27550382416.

It is an arithmetic number, because the mean of its divisors is an integer number (52814075745528).

Almost surely, 2^{211201202221111} is an apocalyptic number.

211201202221111 is a deficient number, since it is larger than the sum of its proper divisors (55100761001).

211201202221111 is an equidigital number, since it uses as much as digits as its factorization.

211201202221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55100761000.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211201202221111 its reverse (111122202102112), we get a palindrome (322323404323223).

The spelling of 211201202221111 in words is "two hundred eleven trillion, two hundred one billion, two hundred two million, two hundred twenty-one thousand, one hundred eleven".