21211312132 has 12 divisors (see below), whose sum is σ = 37125881856. Its totient is φ = 10603917320.

The previous prime is 21211312099. The next prime is 21211312181. The reversal of 21211312132 is 23121311212.

It is a super-2 number, since 2×21211312132² (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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407044 + ... + 456187.

It is an arithmetic number, because the mean of its divisors is an integer number (3093823488).

Almost surely, 2^21211312132 is an apocalyptic number.

It is an amenable number.

21211312132 is a deficient number, since it is larger than the sum of its proper divisors (15914569724).

21211312132 is a wasteful number, since it uses less digits than its factorization.

21211312132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869378 (or 869376 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 21211312132 its reverse (23121311212), we get a palindrome (44332623344).

The spelling of 21211312132 in words is "twenty-one billion, two hundred eleven million, three hundred twelve thousand, one hundred thirty-two".