21211011232 has 48 divisors (see below), whose sum is σ = 42165205992. Its totient is φ = 10502553600.

The previous prime is 21211011203. The next prime is 21211011251. The reversal of 21211011232 is 23211011212.

It can be written as a sum of positive squares in 4 ways, for example, as 8775192976 + 12435818256 = 93676^2 + 111516^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

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 7 ways as a sum of consecutive naturals, for example, 6423982 + ... + 6427282.

Almost surely, 2^21211011232 is an apocalyptic number.

It is an amenable number.

21211011232 is a deficient number, since it is larger than the sum of its proper divisors (20954194760).

21211011232 is a wasteful number, since it uses less digits than its factorization.

21211011232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211011232 its reverse (23211011212), we get a palindrome (44422022444).

The spelling of 21211011232 in words is "twenty-one billion, two hundred eleven million, eleven thousand, two hundred thirty-two".