221222121010213 has 2 divisors, whose sum is σ = 221222121010214. Its totient is φ = 221222121010212.

The previous prime is 221222121010199. The next prime is 221222121010229. The reversal of 221222121010213 is 312010121222122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217510052161284 + 3712068848929 = 14748222^2 + 1926673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222121010213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222191010213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611060505106 + 110611060505107.

It is an arithmetic number, because the mean of its divisors is an integer number (110611060505107).

Almost surely, 2^{221222121010213} is an apocalyptic number.

It is an amenable number.

221222121010213 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222121010213 is an equidigital number, since it uses as much as digits as its factorization.

221222121010213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221222121010213 its reverse (312010121222122), we get a palindrome (533232242232335).

The spelling of 221222121010213 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, ten thousand, two hundred thirteen".