21011121132 has 48 divisors (see below), whose sum is σ = 50258474112. Its totient is φ = 6828232320.

The previous prime is 21011121127. The next prime is 21011121167. The reversal of 21011121132 is 23112111012.

It is a super-2 number, since 2×21011121132² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 245032 + ... + 319472.

It is an arithmetic number, because the mean of its divisors is an integer number (1047051544).

Almost surely, 2^21011121132 is an apocalyptic number.

It is an amenable number.

21011121132 is an abundant number, since it is smaller than the sum of its proper divisors (29247352980).

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

21011121132 is a wasteful number, since it uses less digits than its factorization.

21011121132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75038 (or 75036 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21011121132 its reverse (23112111012), we get a palindrome (44123232144).

The spelling of 21011121132 in words is "twenty-one billion, eleven million, one hundred twenty-one thousand, one hundred thirty-two".