21210311132 has 12 divisors (see below), whose sum is σ = 37401389256. Its totient is φ = 10524199920.

The previous prime is 21210311119. The next prime is 21210311179. The reversal of 21210311132 is 23111301212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210311132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20238323 + ... + 20239370.

It is an arithmetic number, because the mean of its divisors is an integer number (3116782438).

Almost surely, 2^21210311132 is an apocalyptic number.

It is an amenable number.

21210311132 is a deficient number, since it is larger than the sum of its proper divisors (16191078124).

21210311132 is a wasteful number, since it uses less digits than its factorization.

21210311132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40477828 (or 40477826 counting only the distinct ones).

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

Adding to 21210311132 its reverse (23111301212), we get a palindrome (44321612344).

The spelling of 21210311132 in words is "twenty-one billion, two hundred ten million, three hundred eleven thousand, one hundred thirty-two".