201221120103 has 4 divisors (see below), whose sum is σ = 268294826808. Its totient is φ = 134147413400.

The previous prime is 201221120099. The next prime is 201221120153. The reversal of 201221120103 is 301021122102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201221120103 - 2² = 201221120099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221120153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33536853348 + ... + 33536853353.

It is an arithmetic number, because the mean of its divisors is an integer number (67073706702).

Almost surely, 2^201221120103 is an apocalyptic number.

201221120103 is a deficient number, since it is larger than the sum of its proper divisors (67073706705).

201221120103 is an equidigital number, since it uses as much as digits as its factorization.

201221120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67073706704.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201221120103 its reverse (301021122102), we get a palindrome (502242242205).

The spelling of 201221120103 in words is "two hundred one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred three".