21021001132 has 12 divisors (see below), whose sum is σ = 38055260880. Its totient is φ = 10148069456.

The previous prime is 21021001123. The next prime is 21021001153. The reversal of 21021001132 is 23110012012.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 90607648 + ... + 90607879.

It is an arithmetic number, because the mean of its divisors is an integer number (3171271740).

Almost surely, 2^21021001132 is an apocalyptic number.

It is an amenable number.

21021001132 is a deficient number, since it is larger than the sum of its proper divisors (17034259748).

21021001132 is a wasteful number, since it uses less digits than its factorization.

21021001132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181215560 (or 181215558 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21021001132 its reverse (23110012012), we get a palindrome (44131013144).

The spelling of 21021001132 in words is "twenty-one billion, twenty-one million, one thousand, one hundred thirty-two".