211222111020111 has 32 divisors (see below), whose sum is σ = 330599537971200. Its totient is φ = 133066313987040.

The previous prime is 211222111020091. The next prime is 211222111020113. The reversal of 211222111020111 is 111020111222112.

It is a happy number.

211222111020111 is a `hidden beast` number, since 211 + 22 + 211 + 10 + 201 + 11 = 666.

211222111020111 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211222111020111 - 2⁵ = 211222111020079 is a prime.

It is a super-2 number, since 2×211222111020111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222111020113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2869750855 + ... + 2869824456.

It is an arithmetic number, because the mean of its divisors is an integer number (10331235561600).

Almost surely, 2^{211222111020111} is an apocalyptic number.

211222111020111 is a deficient number, since it is larger than the sum of its proper divisors (119377426951089).

211222111020111 is a wasteful number, since it uses less digits than its factorization.

211222111020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739575396 (or 5739575390 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211222111020111 its reverse (111020111222112), we get a palindrome (322242222242223).

The spelling of 211222111020111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred eleven million, twenty thousand, one hundred eleven".