220222202121 has 6 divisors (see below), whose sum is σ = 318098736410. Its totient is φ = 146814801408.

The previous prime is 220222202003. The next prime is 220222202171. The reversal of 220222202121 is 121202222022.

220222202121 is a `hidden beast` number, since 220 + 222 + 202 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 131906249721 + 88315952400 = 363189^2 + 297180^2 .

It is not a de Polignac number, because 220222202121 - 2¹¹ = 220222200073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220222202094 and 220222202103.

It is not an unprimeable number, because it can be changed into a prime (220222202171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12234566776 + ... + 12234566793.

Almost surely, 2^220222202121 is an apocalyptic number.

It is an amenable number.

220222202121 is a deficient number, since it is larger than the sum of its proper divisors (97876534289).

220222202121 is a wasteful number, since it uses less digits than its factorization.

220222202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24469133575 (or 24469133572 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 220222202121 its reverse (121202222022), we get a palindrome (341424424143).

The spelling of 220222202121 in words is "two hundred twenty billion, two hundred twenty-two million, two hundred two thousand, one hundred twenty-one".