222211211202121 has 4 divisors (see below), whose sum is σ = 225024011344000. Its totient is φ = 219398411060244.

The previous prime is 222211211202119. The next prime is 222211211202133. The reversal of 222211211202121 is 121202112112222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222211211202121 - 2¹ = 222211211202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211211202092 and 222211211202101.

It is not an unprimeable number, because it can be changed into a prime (222211211202151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406400070821 + ... + 1406400070978.

It is an arithmetic number, because the mean of its divisors is an integer number (56256002836000).

Almost surely, 2^{222211211202121} is an apocalyptic number.

It is an amenable number.

222211211202121 is a deficient number, since it is larger than the sum of its proper divisors (2812800141879).

222211211202121 is an equidigital number, since it uses as much as digits as its factorization.

222211211202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812800141878.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222211211202121 its reverse (121202112112222), we get a palindrome (343413323314343).

The spelling of 222211211202121 in words is "two hundred twenty-two trillion, two hundred eleven billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".