21133212230 has 16 divisors (see below), whose sum is σ = 40965919344. Its totient is φ = 7803032160.

The previous prime is 21133212223. The next prime is 21133212257. The reversal of 21133212230 is 3221233112.

It is a super-2 number, since 2×21133212230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81281456 + ... + 81281715.

It is an arithmetic number, because the mean of its divisors is an integer number (2560369959).

Almost surely, 2^21133212230 is an apocalyptic number.

21133212230 is a deficient number, since it is larger than the sum of its proper divisors (19832707114).

21133212230 is a wasteful number, since it uses less digits than its factorization.

21133212230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162563191.

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

Adding to 21133212230 its reverse (3221233112), we get a palindrome (24354445342).

The spelling of 21133212230 in words is "twenty-one billion, one hundred thirty-three million, two hundred twelve thousand, two hundred thirty".