20342123121 has 8 divisors (see below), whose sum is σ = 28550348320. Its totient is φ = 12847656672.

The previous prime is 20342123111. The next prime is 20342123129. The reversal of 20342123121 is 12132124302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20342123121 - 2¹¹ = 20342121073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342123129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178439620 + ... + 178439733.

It is an arithmetic number, because the mean of its divisors is an integer number (3568793540).

Almost surely, 2^20342123121 is an apocalyptic number.

It is an amenable number.

20342123121 is a deficient number, since it is larger than the sum of its proper divisors (8208225199).

20342123121 is a wasteful number, since it uses less digits than its factorization.

20342123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356879375.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20342123121 its reverse (12132124302), we get a palindrome (32474247423).

The spelling of 20342123121 in words is "twenty billion, three hundred forty-two million, one hundred twenty-three thousand, one hundred twenty-one".