121220103 has 16 divisors (see below), whose sum is σ = 167321600. Its totient is φ = 78001056.

The previous prime is 121220101. The next prime is 121220107. The reversal of 121220103 is 301022121.

It is not a de Polignac number, because 121220103 - 2¹ = 121220101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9798 + ... + 18396.

It is an arithmetic number, because the mean of its divisors is an integer number (10457600).

Almost surely, 2^121220103 is an apocalyptic number.

121220103 is a deficient number, since it is larger than the sum of its proper divisors (46101497).

121220103 is a wasteful number, since it uses less digits than its factorization.

121220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8766.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121220103 is about 11010.0001362398. Note that the first 3 decimals coincide. The cubic root of 121220103 is about 494.9084658827.

Adding to 121220103 its reverse (301022121), we get a palindrome (422242224).

The spelling of 121220103 in words is "one hundred twenty-one million, two hundred twenty thousand, one hundred three".