211222112020111 has 4 divisors (see below), whose sum is σ = 211765099455000. Its totient is φ = 210679124585224.

The previous prime is 211222112020079. The next prime is 211222112020181. The reversal of 211222112020111 is 111020211222112.

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 211222112020111 - 2⁵ = 211222112020079 is a prime.

It is a super-2 number, since 2×211222112020111² (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 (211222112020181) 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, 271493716861 + ... + 271493717638.

It is an arithmetic number, because the mean of its divisors is an integer number (52941274863750).

Almost surely, 2^{211222112020111} is an apocalyptic number.

211222112020111 is a deficient number, since it is larger than the sum of its proper divisors (542987434889).

211222112020111 is an equidigital number, since it uses as much as digits as its factorization.

211222112020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542987434888.

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

Adding to 211222112020111 its reverse (111020211222112), we get a palindrome (322242323242223).

The spelling of 211222112020111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred twelve million, twenty thousand, one hundred eleven".