221012212122223 has 2 divisors, whose sum is σ = 221012212122224. Its totient is φ = 221012212122222.

The previous prime is 221012212122101. The next prime is 221012212122241. The reversal of 221012212122223 is 322221212210122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221012212122223 - 2⁹ = 221012212121711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012212120223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506106061111 + 110506106061112.

It is an arithmetic number, because the mean of its divisors is an integer number (110506106061112).

Almost surely, 2^{221012212122223} is an apocalyptic number.

221012212122223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012212122223 is an equidigital number, since it uses as much as digits as its factorization.

221012212122223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 221012212122223 its reverse (322221212210122), we get a palindrome (543233424332345).

The spelling of 221012212122223 in words is "two hundred twenty-one trillion, twelve billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-three".