21214422330 has 16 divisors (see below), whose sum is σ = 50914613664. Its totient is φ = 5657179280.

The previous prime is 21214422329. The next prime is 21214422343. The reversal of 21214422330 is 3322441212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214422330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353573676 + ... + 353573735.

It is an arithmetic number, because the mean of its divisors is an integer number (3182163354).

Almost surely, 2^21214422330 is an apocalyptic number.

21214422330 is an abundant number, since it is smaller than the sum of its proper divisors (29700191334).

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

21214422330 is a wasteful number, since it uses less digits than its factorization.

21214422330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707147421.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21214422330 its reverse (3322441212), we get a palindrome (24536863542).

The spelling of 21214422330 in words is "twenty-one billion, two hundred fourteen million, four hundred twenty-two thousand, three hundred thirty".