21342550123 has 8 divisors (see below), whose sum is σ = 22453996320. Its totient is φ = 20259241920.

The previous prime is 21342550111. The next prime is 21342550127. The reversal of 21342550123 is 32105524312.

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

It is a cyclic number.

It is not a de Polignac number, because 21342550123 - 2¹⁷ = 21342419051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21342550091 and 21342550100.

It is not an unprimeable number, because it can be changed into a prime (21342550127) 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 7 ways as a sum of consecutive naturals, for example, 7032943 + ... + 7035976.

It is an arithmetic number, because the mean of its divisors is an integer number (2806749540).

Almost surely, 2^21342550123 is an apocalyptic number.

21342550123 is a deficient number, since it is larger than the sum of its proper divisors (1111446197).

21342550123 is a wasteful number, since it uses less digits than its factorization.

21342550123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068997.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 21342550123 in words is "twenty-one billion, three hundred forty-two million, five hundred fifty thousand, one hundred twenty-three".