21030321132 has 72 divisors (see below), whose sum is σ = 53368376880. Its totient is φ = 6982692480.

The previous prime is 21030321113. The next prime is 21030321161. The reversal of 21030321132 is 23112303012.

21030321132 is a `hidden beast` number, since 210 + 3 + 0 + 321 + 132 = 666.

It is a super-2 number, since 2×21030321132² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13807723 + ... + 13809245.

Almost surely, 2^21030321132 is an apocalyptic number.

It is an amenable number.

21030321132 is an abundant number, since it is smaller than the sum of its proper divisors (32338055748).

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

21030321132 is a wasteful number, since it uses less digits than its factorization.

21030321132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2778 counting only the distinct ones).

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

Adding to 21030321132 its reverse (23112303012), we get a palindrome (44142624144).

The spelling of 21030321132 in words is "twenty-one billion, thirty million, three hundred twenty-one thousand, one hundred thirty-two".