121121102123 has 6 divisors (see below), whose sum is σ = 140895975996. Its totient is φ = 103818087492.

The previous prime is 121121102111. The next prime is 121121102129. The reversal of 121121102123 is 321201121121.

It is a happy number.

It is not a de Polignac number, because 121121102123 - 2⁴ = 121121102107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121102129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1235929565 + ... + 1235929662.

It is an arithmetic number, because the mean of its divisors is an integer number (23482662666).

Almost surely, 2^121121102123 is an apocalyptic number.

121121102123 is a deficient number, since it is larger than the sum of its proper divisors (19774873873).

121121102123 is an equidigital number, since it uses as much as digits as its factorization.

121121102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471859241 (or 2471859234 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121121102123 its reverse (321201121121), we get a palindrome (442322223244).

The spelling of 121121102123 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty-three".