121024128103 has 16 divisors (see below), whose sum is σ = 130893594624. Its totient is φ = 111461150080.

The previous prime is 121024128073. The next prime is 121024128109. The reversal of 121024128103 is 301821420121.

It is not a de Polignac number, because 121024128103 - 2²¹ = 121022030951 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 (121024128109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5971998 + ... + 5992228.

It is an arithmetic number, because the mean of its divisors is an integer number (8180849664).

Almost surely, 2^121024128103 is an apocalyptic number.

121024128103 is a deficient number, since it is larger than the sum of its proper divisors (9869466521).

121024128103 is a wasteful number, since it uses less digits than its factorization.

121024128103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27782.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 121024128103 its reverse (301821420121), we get a palindrome (422845548224).

The spelling of 121024128103 in words is "one hundred twenty-one billion, twenty-four million, one hundred twenty-eight thousand, one hundred three".