212111201121 has 12 divisors (see below), whose sum is σ = 292903461552. Its totient is φ = 136531346224.

The previous prime is 212111201119. The next prime is 212111201123. The reversal of 212111201121 is 121102111212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212111201119) and next prime (212111201123).

It is not a de Polignac number, because 212111201121 - 2¹ = 212111201119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212111201121.

It is not an unprimeable number, because it can be changed into a prime (212111201123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42032991 + ... + 42038036.

It is an arithmetic number, because the mean of its divisors is an integer number (24408621796).

Almost surely, 2^212111201121 is an apocalyptic number.

It is an amenable number.

212111201121 is a deficient number, since it is larger than the sum of its proper divisors (80792260431).

212111201121 is an equidigital number, since it uses as much as digits as its factorization.

212111201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84071088 (or 84071059 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212111201121 its reverse (121102111212), we get a palindrome (333213312333).

The spelling of 212111201121 in words is "two hundred twelve billion, one hundred eleven million, two hundred one thousand, one hundred twenty-one".