2212123121 has 16 divisors (see below), whose sum is σ = 2442862464. Its totient is φ = 1990669824.

The previous prime is 2212123099. The next prime is 2212123153. The reversal of 2212123121 is 1213212122.

2212123121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2212123121 - 2¹⁰ = 2212122097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2212123121.

It is not an unprimeable number, because it can be changed into a prime (2212123021) 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, 71396 + ... + 97578.

It is an arithmetic number, because the mean of its divisors is an integer number (152678904).

Almost surely, 2^2212123121 is an apocalyptic number.

It is an amenable number.

2212123121 is a deficient number, since it is larger than the sum of its proper divisors (230739343).

2212123121 is a wasteful number, since it uses less digits than its factorization.

2212123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26360.

The product of its digits is 96, while the sum is 17.

The square root of 2212123121 is about 47033.2129563780. The cubic root of 2212123121 is about 1302.9760459426.

Adding to 2212123121 its reverse (1213212122), we get a palindrome (3425335243).

The spelling of 2212123121 in words is "two billion, two hundred twelve million, one hundred twenty-three thousand, one hundred twenty-one".