222211121222121 has 16 divisors (see below), whose sum is σ = 296325845673984. Its totient is φ = 148118573007504.

The previous prime is 222211121222117. The next prime is 222211121222137. The reversal of 222211121222121 is 121222121112222.

It is not a de Polignac number, because 222211121222121 - 2² = 222211121222117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222211121222091 and 222211121222100.

It is not an unprimeable number, because it can be changed into a prime (222211121229121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485065316 + ... + 1485214938.

It is an arithmetic number, because the mean of its divisors is an integer number (18520365354624).

Almost surely, 2^{222211121222121} is an apocalyptic number.

It is an amenable number.

222211121222121 is a deficient number, since it is larger than the sum of its proper divisors (74114724451863).

222211121222121 is a wasteful number, since it uses less digits than its factorization.

222211121222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220420.

The product of its digits is 512, while the sum is 24.

Adding to 222211121222121 its reverse (121222121112222), we get a palindrome (343433242334343).

The spelling of 222211121222121 in words is "two hundred twenty-two trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".