121442110423 has 4 divisors (see below), whose sum is σ = 125359597888. Its totient is φ = 117524622960.

The previous prime is 121442110421. The next prime is 121442110459. The reversal of 121442110423 is 324011244121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324011244121 = 8647 ⋅37470943.

It is a cyclic number.

It is not a de Polignac number, because 121442110423 - 2¹ = 121442110421 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 (121442110421) 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 3 ways as a sum of consecutive naturals, for example, 1958743686 + ... + 1958743747.

It is an arithmetic number, because the mean of its divisors is an integer number (31339899472).

Almost surely, 2^121442110423 is an apocalyptic number.

121442110423 is a deficient number, since it is larger than the sum of its proper divisors (3917487465).

121442110423 is an equidigital number, since it uses as much as digits as its factorization.

121442110423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917487464.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 121442110423 its reverse (324011244121), we get a palindrome (445453354544).

The spelling of 121442110423 in words is "one hundred twenty-one billion, four hundred forty-two million, one hundred ten thousand, four hundred twenty-three".