21211022432 has 12 divisors (see below), whose sum is σ = 41759200476. Its totient is φ = 10605511200.

The previous prime is 21211022431. The next prime is 21211022543. The reversal of 21211022432 is 23422011212.

It is a super-2 number, since 2×21211022432² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211022431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331422194 + ... + 331422257.

It is an arithmetic number, because the mean of its divisors is an integer number (3479933373).

Almost surely, 2^21211022432 is an apocalyptic number.

It is an amenable number.

21211022432 is a deficient number, since it is larger than the sum of its proper divisors (20548178044).

21211022432 is an equidigital number, since it uses as much as digits as its factorization.

21211022432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662844461 (or 662844453 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21211022432 its reverse (23422011212), we get a palindrome (44633033644).

The spelling of 21211022432 in words is "twenty-one billion, two hundred eleven million, twenty-two thousand, four hundred thirty-two".