222231790021 has 2 divisors, whose sum is σ = 222231790022. Its totient is φ = 222231790020.

The previous prime is 222231789991. The next prime is 222231790093. The reversal of 222231790021 is 120097132222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215097453796 + 7134336225 = 463786^2 + 84465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222231790021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222231790321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111115895010 + 111115895011.

It is an arithmetic number, because the mean of its divisors is an integer number (111115895011).

Almost surely, 2^222231790021 is an apocalyptic number.

It is an amenable number.

222231790021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222231790021 is an equidigital number, since it uses as much as digits as its factorization.

222231790021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 222231790021 in words is "two hundred twenty-two billion, two hundred thirty-one million, seven hundred ninety thousand, twenty-one".