211222110121 has 16 divisors (see below), whose sum is σ = 233038368576. Its totient is φ = 189847000000.

The previous prime is 211222110107. The next prime is 211222110137. The reversal of 211222110121 is 121011222112.

It is a cyclic number.

It is not a de Polignac number, because 211222110121 - 2²³ = 211213721513 is a prime.

It is a super-3 number, since 3×211222110121³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211222110095 and 211222110104.

It is not an unprimeable number, because it can be changed into a prime (211222110821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643206 + ... + 914416.

It is an arithmetic number, because the mean of its divisors is an integer number (14564898036).

Almost surely, 2^211222110121 is an apocalyptic number.

It is an amenable number.

211222110121 is a deficient number, since it is larger than the sum of its proper divisors (21816258455).

211222110121 is a wasteful number, since it uses less digits than its factorization.

211222110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272024.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211222110121 its reverse (121011222112), we get a palindrome (332233332233).

The spelling of 211222110121 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred ten thousand, one hundred twenty-one".