21030221132 has 12 divisors (see below), whose sum is σ = 36938692896. Its totient is φ = 10476308880.

The previous prime is 21030221119. The next prime is 21030221153. The reversal of 21030221132 is 23112203012.

It is a super-2 number, since 2×21030221132² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21030221132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9699203 + ... + 9701370.

It is an arithmetic number, because the mean of its divisors is an integer number (3078224408).

Almost surely, 2^21030221132 is an apocalyptic number.

It is an amenable number.

21030221132 is a deficient number, since it is larger than the sum of its proper divisors (15908471764).

21030221132 is a wasteful number, since it uses less digits than its factorization.

21030221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19400848 (or 19400846 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21030221132 its reverse (23112203012), we get a palindrome (44142424144).

The spelling of 21030221132 in words is "twenty-one billion, thirty million, two hundred twenty-one thousand, one hundred thirty-two".