222210022421 has 2 divisors, whose sum is σ = 222210022422. Its totient is φ = 222210022420.

The previous prime is 222210022393. The next prime is 222210022439. The reversal of 222210022421 is 124220012222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126103822321 + 96106200100 = 355111^2 + 310010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222210022421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222210022393 and 222210022402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222210022451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111105011210 + 111105011211.

It is an arithmetic number, because the mean of its divisors is an integer number (111105011211).

Almost surely, 2^222210022421 is an apocalyptic number.

It is an amenable number.

222210022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222210022421 is an equidigital number, since it uses as much as digits as its factorization.

222210022421 is an evil number, because the sum of its binary digits is even.

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

Adding to 222210022421 its reverse (124220012222), we get a palindrome (346430034643).

The spelling of 222210022421 in words is "two hundred twenty-two billion, two hundred ten million, twenty-two thousand, four hundred twenty-one".