211222222011 has 24 divisors (see below), whose sum is σ = 313510448784. Its totient is φ = 136936526400.

The previous prime is 211222221989. The next prime is 211222222019. The reversal of 211222222011 is 110222222112.

It is a happy number.

211222222011 is a `hidden beast` number, since 211 + 2 + 222 + 220 + 11 = 666.

It is not a de Polignac number, because 211222222011 - 2⁷ = 211222221883 is a prime.

It is a super-2 number, since 2×211222222011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211222222019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 466200 + ... + 799866.

It is an arithmetic number, because the mean of its divisors is an integer number (13062935366).

Almost surely, 2^211222222011 is an apocalyptic number.

211222222011 is a deficient number, since it is larger than the sum of its proper divisors (102288226773).

211222222011 is a wasteful number, since it uses less digits than its factorization.

211222222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335611 (or 335608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211222222011 its reverse (110222222112), we get a palindrome (321444444123).

It can be divided in two parts, 211 and 222222011, that added together give a palindrome (222222222).

The spelling of 211222222011 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, eleven".