121400134123 has 16 divisors (see below), whose sum is σ = 127512403200. Its totient is φ = 115359772000.

The previous prime is 121400134091. The next prime is 121400134153. The reversal of 121400134123 is 321431004121.

It is a cyclic number.

It is not a de Polignac number, because 121400134123 - 2⁵ = 121400134091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121400134094 and 121400134103.

It is not an unprimeable number, because it can be changed into a prime (121400134153) 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, 2218668 + ... + 2272726.

It is an arithmetic number, because the mean of its divisors is an integer number (7969525200).

Almost surely, 2^121400134123 is an apocalyptic number.

121400134123 is a deficient number, since it is larger than the sum of its proper divisors (6112269077).

121400134123 is a wasteful number, since it uses less digits than its factorization.

121400134123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54722.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121400134123 its reverse (321431004121), we get a palindrome (442831138244).

The spelling of 121400134123 in words is "one hundred twenty-one billion, four hundred million, one hundred thirty-four thousand, one hundred twenty-three".