21330123201 has 16 divisors (see below), whose sum is σ = 31611862720. Its totient is φ = 14214826080.

The previous prime is 21330123179. The next prime is 21330123257. The reversal of 21330123201 is 10232103312.

21330123201 is a `hidden beast` number, since 2 + 1 + 330 + 12 + 320 + 1 = 666.

It is not a de Polignac number, because 21330123201 - 2²³ = 21321734593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330123401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70900 + ... + 218373.

It is an arithmetic number, because the mean of its divisors is an integer number (1975741420).

Almost surely, 2^21330123201 is an apocalyptic number.

It is an amenable number.

21330123201 is a deficient number, since it is larger than the sum of its proper divisors (10281739519).

21330123201 is a wasteful number, since it uses less digits than its factorization.

21330123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292013 (or 292007 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21330123201 its reverse (10232103312), we get a palindrome (31562226513).

The spelling of 21330123201 in words is "twenty-one billion, three hundred thirty million, one hundred twenty-three thousand, two hundred one".