222222211202121 has 16 divisors (see below), whose sum is σ = 319114999182336. Its totient is φ = 136740688862976.

The previous prime is 222222211202099. The next prime is 222222211202141. The reversal of 222222211202121 is 121202112222222.

It is a happy number.

222222211202121 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 222222211202121 - 2³³ = 222213621267529 is a prime.

It is a super-2 number, since 2×222222211202121² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222222211202091 and 222222211202100.

It is not an unprimeable number, because it can be changed into a prime (222222211202141) 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, 237884265 + ... + 238816598.

It is an arithmetic number, because the mean of its divisors is an integer number (19944687448896).

Almost surely, 2^{222222211202121} is an apocalyptic number.

It is an amenable number.

222222211202121 is a deficient number, since it is larger than the sum of its proper divisors (96892787980215).

222222211202121 is a wasteful number, since it uses less digits than its factorization.

222222211202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476712832.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 222222211202121 its reverse (121202112222222), we get a palindrome (343424323424343).

The spelling of 222222211202121 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".