221101212103 has 2 divisors, whose sum is σ = 221101212104. Its totient is φ = 221101212102.

The previous prime is 221101212047. The next prime is 221101212113. The reversal of 221101212103 is 301212101122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221101212103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221101212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550606051 + 110550606052.

It is an arithmetic number, because the mean of its divisors is an integer number (110550606052).

Almost surely, 2^221101212103 is an apocalyptic number.

221101212103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221101212103 is an equidigital number, since it uses as much as digits as its factorization.

221101212103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221101212103 its reverse (301212101122), we get a palindrome (522313313225).

The spelling of 221101212103 in words is "two hundred twenty-one billion, one hundred one million, two hundred twelve thousand, one hundred three".