2222312121 has 6 divisors (see below), whose sum is σ = 3210006410. Its totient is φ = 1481541408.

The previous prime is 2222312087. The next prime is 2222312129. The reversal of 2222312121 is 1212132222.

2222312121 is a `hidden beast` number, since 222 + 231 + 212 + 1 = 666.

2222312121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1828845225 + 393466896 = 42765^2 + 19836^2 .

It is not a de Polignac number, because 2222312121 - 2¹⁰ = 2222311097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222312094 and 2222312103.

It is not an unprimeable number, because it can be changed into a prime (2222312129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123461776 + ... + 123461793.

Almost surely, 2^2222312121 is an apocalyptic number.

It is an amenable number.

2222312121 is a deficient number, since it is larger than the sum of its proper divisors (987694289).

2222312121 is a wasteful number, since it uses less digits than its factorization.

2222312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246923575 (or 246923572 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2222312121 is about 47141.4055899906. The cubic root of 2222312121 is about 1304.9734772431.

Adding to 2222312121 its reverse (1212132222), we get a palindrome (3434444343).

The spelling of 2222312121 in words is "two billion, two hundred twenty-two million, three hundred twelve thousand, one hundred twenty-one".