211222111113 has 36 divisors (see below), whose sum is σ = 331309788732. Its totient is φ = 129614284800.

The previous prime is 211222111033. The next prime is 211222111151. The reversal of 211222111113 is 311111222112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 86805069129 + 124417041984 = 294627^2 + 352728^2 .

It is not a de Polignac number, because 211222111113 - 2³⁰ = 210148369289 is a prime.

It is a super-2 number, since 2×211222111113² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211222111153) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 340213 + ... + 733613.

It is an arithmetic number, because the mean of its divisors is an integer number (9203049687).

Almost surely, 2^211222111113 is an apocalyptic number.

It is an amenable number.

211222111113 is a deficient number, since it is larger than the sum of its proper divisors (120087677619).

211222111113 is a wasteful number, since it uses less digits than its factorization.

211222111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393786 (or 393770 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 211222111113 its reverse (311111222112), we get a palindrome (522333333225).

The spelling of 211222111113 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, one hundred thirteen".