21211123213232 has 20 divisors (see below), whose sum is σ = 42422246427456. Its totient is φ = 10263446715840.

The previous prime is 21211123213219. The next prime is 21211123213271. The reversal of 21211123213232 is 23231232111212.

21211123213232 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21382180163 + ... + 21382181154.

Almost surely, 2^{21211123213232} is an apocalyptic number.

It is an amenable number.

21211123213232 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21211123213232 is a wasteful number, since it uses less digits than its factorization.

21211123213232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42764361356 (or 42764361350 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

Adding to 21211123213232 its reverse (23231232111212), we get a palindrome (44442355324444).

The spelling of 21211123213232 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-two".