21122132334432 has 48 divisors (see below), whose sum is σ = 55499376102912. Its totient is φ = 7033881733760.

The previous prime is 21122132334431. The next prime is 21122132334449. The reversal of 21122132334432 is 23443323122112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×21122132334432² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21122132334393 and 21122132334402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122132334431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106604328 + ... + 106802279.

It is an arithmetic number, because the mean of its divisors is an integer number (1156237002144).

Almost surely, 2^{21122132334432} is an apocalyptic number.

It is an amenable number.

21122132334432 is an abundant number, since it is smaller than the sum of its proper divisors (34377243768480).

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

21122132334432 is a wasteful number, since it uses less digits than its factorization.

21122132334432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213407651 (or 213407643 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

Adding to 21122132334432 its reverse (23443323122112), we get a palindrome (44565455456544).

The spelling of 21122132334432 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred thirty-two million, three hundred thirty-four thousand, four hundred thirty-two".