121020021103 has 4 divisors (see below), whose sum is σ = 121179049488. Its totient is φ = 120860992720.

The previous prime is 121020021077. The next prime is 121020021179. The reversal of 121020021103 is 301120020121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301120020121 = 15629 ⋅19266749.

It is a cyclic number.

It is not a de Polignac number, because 121020021103 - 2⁹ = 121020020591 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 (121020021193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79513051 + ... + 79514572.

It is an arithmetic number, because the mean of its divisors is an integer number (30294762372).

Almost surely, 2^121020021103 is an apocalyptic number.

121020021103 is a deficient number, since it is larger than the sum of its proper divisors (159028385).

121020021103 is an equidigital number, since it uses as much as digits as its factorization.

121020021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159028384.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121020021103 its reverse (301120020121), we get a palindrome (422140041224).

The spelling of 121020021103 in words is "one hundred twenty-one billion, twenty million, twenty-one thousand, one hundred three".