21211143220432 has 80 divisors (see below), whose sum is σ = 44934672729024. Its totient is φ = 9619492608000.

The previous prime is 21211143220391. The next prime is 21211143220469. The reversal of 21211143220432 is 23402234111212.

It is a super-2 number, since 2×21211143220432² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21211143220432.

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 15 ways as a sum of consecutive naturals, for example, 892675432 + ... + 892699192.

Almost surely, 2^{21211143220432} is an apocalyptic number.

21211143220432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21211143220432 is an abundant number, since it is smaller than the sum of its proper divisors (23723529508592).

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

21211143220432 is a wasteful number, since it uses less digits than its factorization.

21211143220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35108 (or 35102 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21211143220432 its reverse (23402234111212), we get a palindrome (44613377331644).

It can be divided in two parts, 2121114 and 3220432, that added together give a triangular number (5341546 = T₃₂₆₈).

The spelling of 21211143220432 in words is "twenty-one trillion, two hundred eleven billion, one hundred forty-three million, two hundred twenty thousand, four hundred thirty-two".