21220133234 has 16 divisors (see below), whose sum is σ = 32016231936. Its totient is φ = 10548123600.

The previous prime is 21220133203. The next prime is 21220133267. The reversal of 21220133234 is 43233102212.

It is a super-2 number, since 2×21220133234² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 649109 + ... + 681015.

It is an arithmetic number, because the mean of its divisors is an integer number (2001014496).

Almost surely, 2^21220133234 is an apocalyptic number.

21220133234 is a deficient number, since it is larger than the sum of its proper divisors (10796098702).

21220133234 is a wasteful number, since it uses less digits than its factorization.

21220133234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33841.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21220133234 its reverse (43233102212), we get a palindrome (64453235446).

The spelling of 21220133234 in words is "twenty-one billion, two hundred twenty million, one hundred thirty-three thousand, two hundred thirty-four".