121103133123 has 16 divisors (see below), whose sum is σ = 184543348736. Its totient is φ = 69199824960.

The previous prime is 121103133097. The next prime is 121103133127. The reversal of 121103133123 is 321331301121.

It is a happy number.

It is not a de Polignac number, because 121103133123 - 2¹⁰ = 121103132099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121103133123.

It is not an unprimeable number, because it can be changed into a prime (121103133127) 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, 1019790 + ... + 1132332.

It is an arithmetic number, because the mean of its divisors is an integer number (11533959296).

Almost surely, 2^121103133123 is an apocalyptic number.

121103133123 is a deficient number, since it is larger than the sum of its proper divisors (63440215613).

121103133123 is a wasteful number, since it uses less digits than its factorization.

121103133123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163794.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 121103133123 its reverse (321331301121), we get a palindrome (442434434244).

The spelling of 121103133123 in words is "one hundred twenty-one billion, one hundred three million, one hundred thirty-three thousand, one hundred twenty-three".