222220222121 has 16 divisors (see below), whose sum is σ = 226315098240. Its totient is φ = 218140490880.

The previous prime is 222220222061. The next prime is 222220222139. The reversal of 222220222121 is 121222022222.

It is a cyclic number.

It is not a de Polignac number, because 222220222121 - 2¹⁴ = 222220205737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222220222093 and 222220222102.

It is not an unprimeable number, because it can be changed into a prime (222220222921) 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, 120313220 + ... + 120315066.

It is an arithmetic number, because the mean of its divisors is an integer number (14144693640).

Almost surely, 2^222220222121 is an apocalyptic number.

It is an amenable number.

222220222121 is a deficient number, since it is larger than the sum of its proper divisors (4094876119).

222220222121 is a wasteful number, since it uses less digits than its factorization.

222220222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222220222121 its reverse (121222022222), we get a palindrome (343442244343).

The spelling of 222220222121 in words is "two hundred twenty-two billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".