222000002121 has 32 divisors (see below), whose sum is σ = 312748204032. Its totient is φ = 139852903680.

The previous prime is 222000002083. The next prime is 222000002149. The reversal of 222000002121 is 121200000222.

It is not a de Polignac number, because 222000002121 - 2¹¹ = 222000000073 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222000002097 and 222000002106.

It is not an unprimeable number, because it can be changed into a prime (222000002821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18321361 + ... + 18333473.

It is an arithmetic number, because the mean of its divisors is an integer number (9773381376).

Almost surely, 2^222000002121 is an apocalyptic number.

It is an amenable number.

222000002121 is a deficient number, since it is larger than the sum of its proper divisors (90748201911).

222000002121 is a wasteful number, since it uses less digits than its factorization.

222000002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222000002121 its reverse (121200000222), we get a palindrome (343200002343).

The spelling of 222000002121 in words is "two hundred twenty-two billion, two thousand, one hundred twenty-one".