21332120123 has 8 divisors (see below), whose sum is σ = 21614822400. Its totient is φ = 21049734888.

The previous prime is 21332120111. The next prime is 21332120167. The reversal of 21332120123 is 32102123312.

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 21332120123 - 2¹² = 21332116027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332120095 and 21332120104.

It is not an unprimeable number, because it can be changed into a prime (21332128123) 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, 57758 + ... + 214476.

It is an arithmetic number, because the mean of its divisors is an integer number (2701852800).

Almost surely, 2^21332120123 is an apocalyptic number.

21332120123 is a deficient number, since it is larger than the sum of its proper divisors (282702277).

21332120123 is a wasteful number, since it uses less digits than its factorization.

21332120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158521.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21332120123 its reverse (32102123312), we get a palindrome (53434243435).

The spelling of 21332120123 in words is "twenty-one billion, three hundred thirty-two million, one hundred twenty thousand, one hundred twenty-three".