21222030132 has 60 divisors (see below), whose sum is σ = 56659014720. Its totient is φ = 6923494224.

The previous prime is 21222030101. The next prime is 21222030157. The reversal of 21222030132 is 23103022212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 681582 + ... + 712037.

It is an arithmetic number, because the mean of its divisors is an integer number (944316912).

Almost surely, 2^21222030132 is an apocalyptic number.

It is an amenable number.

21222030132 is an abundant number, since it is smaller than the sum of its proper divisors (35436984588).

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

21222030132 is a wasteful number, since it uses less digits than its factorization.

21222030132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393682 (or 1393671 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21222030132 its reverse (23103022212), we get a palindrome (44325052344).

The spelling of 21222030132 in words is "twenty-one billion, two hundred twenty-two million, thirty thousand, one hundred thirty-two".