21212414132 has 96 divisors (see below), whose sum is σ = 46581679872. Its totient is φ = 8228791296.

The previous prime is 21212414129. The next prime is 21212414147. The reversal of 21212414132 is 23141421212.

It is a junction number, because it is equal to n+sod(n) for n = 21212414098 and 21212414107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5680538 + ... + 5684270.

It is an arithmetic number, because the mean of its divisors is an integer number (485225832).

Almost surely, 2^21212414132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21212414132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23290839936).

21212414132 is an abundant number, since it is smaller than the sum of its proper divisors (25369265740).

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

21212414132 is a wasteful number, since it uses less digits than its factorization.

21212414132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057 (or 4055 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

Adding to 21212414132 its reverse (23141421212), we get a palindrome (44353835344).

The spelling of 21212414132 in words is "twenty-one billion, two hundred twelve million, four hundred fourteen thousand, one hundred thirty-two".