21003021132 has 24 divisors (see below), whose sum is σ = 50696948400. Its totient is φ = 6759592896.

The previous prime is 21003021071. The next prime is 21003021139. The reversal of 21003021132 is 23112030012.

It is a super-2 number, since 2×21003021132² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21003021139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30176407 + ... + 30177102.

It is an arithmetic number, because the mean of its divisors is an integer number (2112372850).

Almost surely, 2^21003021132 is an apocalyptic number.

It is an amenable number.

21003021132 is an abundant number, since it is smaller than the sum of its proper divisors (29693927268).

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

21003021132 is a wasteful number, since it uses less digits than its factorization.

21003021132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60353545 (or 60353543 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21003021132 its reverse (23112030012), we get a palindrome (44115051144).

The spelling of 21003021132 in words is "twenty-one billion, three million, twenty-one thousand, one hundred thirty-two".