121013423 has 4 divisors (see below), whose sum is σ = 121289520. Its totient is φ = 120737328.

The previous prime is 121013411. The next prime is 121013437. The reversal of 121013423 is 324310121.

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 121013423 - 2⁴ = 121013407 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 (121013483) 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, 137390 + ... + 138267.

It is an arithmetic number, because the mean of its divisors is an integer number (30322380).

Almost surely, 2^121013423 is an apocalyptic number.

121013423 is a deficient number, since it is larger than the sum of its proper divisors (276097).

121013423 is an equidigital number, since it uses as much as digits as its factorization.

121013423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276096.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121013423 is about 11000.6101194434. The cubic root of 121013423 is about 494.6270332717.

Adding to 121013423 its reverse (324310121), we get a palindrome (445323544).

The spelling of 121013423 in words is "one hundred twenty-one million, thirteen thousand, four hundred twenty-three".