221212210103 has 2 divisors, whose sum is σ = 221212210104. Its totient is φ = 221212210102.

The previous prime is 221212210067. The next prime is 221212210147. The reversal of 221212210103 is 301012212122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221212210103 - 2³² = 216917242807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221212210603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606105051 + 110606105052.

It is an arithmetic number, because the mean of its divisors is an integer number (110606105052).

Almost surely, 2^221212210103 is an apocalyptic number.

221212210103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212210103 is an equidigital number, since it uses as much as digits as its factorization.

221212210103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221212210103 its reverse (301012212122), we get a palindrome (522224422225).

The spelling of 221212210103 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, one hundred three".