21001012132 has 24 divisors (see below), whose sum is σ = 40368081600. Its totient is φ = 9515331936.

The previous prime is 21001012129. The next prime is 21001012147. The reversal of 21001012132 is 23121010012.

It is a super-2 number, since 2×21001012132² (a number of 21 digits) contains 22 as substring.

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, 6005407 + ... + 6008902.

It is an arithmetic number, because the mean of its divisors is an integer number (1682003400).

Almost surely, 2^21001012132 is an apocalyptic number.

It is an amenable number.

21001012132 is a deficient number, since it is larger than the sum of its proper divisors (19367069468).

21001012132 is a wasteful number, since it uses less digits than its factorization.

21001012132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12014355 (or 12014353 counting only the distinct ones).

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

Adding to 21001012132 its reverse (23121010012), we get a palindrome (44122022144).

The spelling of 21001012132 in words is "twenty-one billion, one million, twelve thousand, one hundred thirty-two".