222010210028021 has 2 divisors, whose sum is σ = 222010210028022. Its totient is φ = 222010210028020.

The previous prime is 222010210028017. The next prime is 222010210028029. The reversal of 222010210028021 is 120820012010222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136841121763921 + 85169088264100 = 11697911^2 + 9228710^2 .

It is a cyclic number.

It is not a de Polignac number, because 222010210028021 - 2² = 222010210028017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222010210028029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005105014010 + 111005105014011.

It is an arithmetic number, because the mean of its divisors is an integer number (111005105014011).

Almost surely, 2^{222010210028021} is an apocalyptic number.

It is an amenable number.

222010210028021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222010210028021 is an equidigital number, since it uses as much as digits as its factorization.

222010210028021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222010210028021 its reverse (120820012010222), we get a palindrome (342830222038243).

The spelling of 222010210028021 in words is "two hundred twenty-two trillion, ten billion, two hundred ten million, twenty-eight thousand, twenty-one".