121101110002123 has 4 divisors (see below), whose sum is σ = 121226343829360. Its totient is φ = 120975876174888.

The previous prime is 121101110002111. The next prime is 121101110002133. The reversal of 121101110002123 is 321200011101121.

It is a happy number.

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 121101110002123 - 2²⁵ = 121101076447691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121101110002097 and 121101110002106.

It is not an unprimeable number, because it can be changed into a prime (121101110002133) 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, 62616912168 + ... + 62616914101.

It is an arithmetic number, because the mean of its divisors is an integer number (30306585957340).

Almost surely, 2^{121101110002123} is an apocalyptic number.

121101110002123 is a deficient number, since it is larger than the sum of its proper divisors (125233827237).

121101110002123 is an equidigital number, since it uses as much as digits as its factorization.

121101110002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125233827236.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121101110002123 its reverse (321200011101121), we get a palindrome (442301121103244).

The spelling of 121101110002123 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred ten million, two thousand, one hundred twenty-three".