23421121309 has 4 divisors (see below), whose sum is σ = 23438255904. Its totient is φ = 23403986716.

The previous prime is 23421121307. The next prime is 23421121313. The reversal of 23421121309 is 90312112432.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23421121309 - 2¹ = 23421121307 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 (23421121307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8565247 + ... + 8567980.

It is an arithmetic number, because the mean of its divisors is an integer number (5859563976).

Almost surely, 2^23421121309 is an apocalyptic number.

It is an amenable number.

23421121309 is a deficient number, since it is larger than the sum of its proper divisors (17134595).

23421121309 is a wasteful number, since it uses less digits than its factorization.

23421121309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17134594.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 23421121309 in words is "twenty-three billion, four hundred twenty-one million, one hundred twenty-one thousand, three hundred nine".