121021103 has 4 divisors (see below), whose sum is σ = 138309840. Its totient is φ = 103732368.

The previous prime is 121021097. The next prime is 121021111. The reversal of 121021103 is 301120121.

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 121021103 - 2⁶ = 121021039 is a prime.

It is a super-2 number, since 2×121021103² = 29292214742673218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021183) 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, 8644358 + ... + 8644371.

It is an arithmetic number, because the mean of its divisors is an integer number (34577460).

Almost surely, 2^121021103 is an apocalyptic number.

121021103 is a deficient number, since it is larger than the sum of its proper divisors (17288737).

121021103 is an equidigital number, since it uses as much as digits as its factorization.

121021103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17288736.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121021103 is about 11000.9591854529. The cubic root of 121021103 is about 494.6374967260.

Adding to 121021103 its reverse (301120121), we get a palindrome (422141224).

The spelling of 121021103 in words is "one hundred twenty-one million, twenty-one thousand, one hundred three".