222022102220021 has 4 divisors (see below), whose sum is σ = 222023034427500. Its totient is φ = 222021170012544.

The previous prime is 222022102220011. The next prime is 222022102220053. The reversal of 222022102220021 is 120022201220222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76312699089796 + 145709403130225 = 8735714^2 + 12071015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222022102220021 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 = 222022102219975 and 222022102220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222022102220011) 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, 465746396 + ... + 466222853.

It is an arithmetic number, because the mean of its divisors is an integer number (55505758606875).

Almost surely, 2^{222022102220021} is an apocalyptic number.

It is an amenable number.

222022102220021 is a deficient number, since it is larger than the sum of its proper divisors (932207479).

222022102220021 is an equidigital number, since it uses as much as digits as its factorization.

222022102220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932207478.

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

Adding to 222022102220021 its reverse (120022201220222), we get a palindrome (342044303440243).

The spelling of 222022102220021 in words is "two hundred twenty-two trillion, twenty-two billion, one hundred two million, two hundred twenty thousand, twenty-one".