21230133330 has 64 divisors (see below), whose sum is σ = 59651520768. Its totient is φ = 4734243840.

The previous prime is 21230133329. The next prime is 21230133343. The reversal of 21230133330 is 3333103212.

It is a super-2 number, since 2×21230133330² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21230133297 and 21230133306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1224267 + ... + 1241486.

It is an arithmetic number, because the mean of its divisors is an integer number (932055012).

Almost surely, 2^21230133330 is an apocalyptic number.

21230133330 is an abundant number, since it is smaller than the sum of its proper divisors (38421387438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21230133330 is a wasteful number, since it uses less digits than its factorization.

21230133330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465811.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21230133330 its reverse (3333103212), we get a palindrome (24563236542).

The spelling of 21230133330 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three thousand, three hundred thirty".