222102002021 has 2 divisors, whose sum is σ = 222102002022. Its totient is φ = 222102002020.

The previous prime is 222102002011. The next prime is 222102002027. The reversal of 222102002021 is 120200201222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221924845921 + 177156100 = 471089^2 + 13310^2 .

It is a cyclic number.

It is not a de Polignac number, because 222102002021 - 2²² = 222097807717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222102001987 and 222102002005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222102002027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111051001010 + 111051001011.

It is an arithmetic number, because the mean of its divisors is an integer number (111051001011).

Almost surely, 2^222102002021 is an apocalyptic number.

It is an amenable number.

222102002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222102002021 is an equidigital number, since it uses as much as digits as its factorization.

222102002021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222102002021 its reverse (120200201222), we get a palindrome (342302203243).

The spelling of 222102002021 in words is "two hundred twenty-two billion, one hundred two million, two thousand, twenty-one".