21011321132 has 6 divisors (see below), whose sum is σ = 36769811988. Its totient is φ = 10505660564.

The previous prime is 21011321129. The next prime is 21011321153. The reversal of 21011321132 is 23112311012.

It is a super-2 number, since 2×21011321132² (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 21011321132.

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 as a sum of consecutive naturals, namely, 2626415138 + ... + 2626415145.

It is an arithmetic number, because the mean of its divisors is an integer number (6128301998).

Almost surely, 2^21011321132 is an apocalyptic number.

It is an amenable number.

21011321132 is a deficient number, since it is larger than the sum of its proper divisors (15758490856).

21011321132 is a wasteful number, since it uses less digits than its factorization.

21011321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5252830287 (or 5252830285 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21011321132 its reverse (23112311012), we get a palindrome (44123632144).

The spelling of 21011321132 in words is "twenty-one billion, eleven million, three hundred twenty-one thousand, one hundred thirty-two".