21222123330 has 32 divisors (see below), whose sum is σ = 50953307904. Its totient is φ = 5656987136.

The previous prime is 21222123319. The next prime is 21222123341. The reversal of 21222123330 is 3332122212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21222123319) and next prime (21222123341).

It is a junction number, because it is equal to n+sod(n) for n = 21222123297 and 21222123306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62799 + ... + 215378.

It is an arithmetic number, because the mean of its divisors is an integer number (1592290872).

Almost surely, 2^21222123330 is an apocalyptic number.

21222123330 is an abundant number, since it is smaller than the sum of its proper divisors (29731184574).

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

21222123330 is a wasteful number, since it uses less digits than its factorization.

21222123330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280730.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21222123330 its reverse (3332122212), we get a palindrome (24554245542).

The spelling of 21222123330 in words is "twenty-one billion, two hundred twenty-two million, one hundred twenty-three thousand, three hundred thirty".