21222000030 has 384 divisors, whose sum is σ = 68119833600. Its totient is φ = 4130058240.

The previous prime is 21222000029. The next prime is 21222000061. The reversal of 21222000030 is 3000022212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 54555076 + ... + 54555464.

It is an arithmetic number, because the mean of its divisors is an integer number (177395400).

Almost surely, 2^21222000030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222000030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34059916800).

21222000030 is an abundant number, since it is smaller than the sum of its proper divisors (46897833570).

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

21222000030 is a wasteful number, since it uses less digits than its factorization.

21222000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21222000030 its reverse (3000022212), we get a palindrome (24222022242).

The spelling of 21222000030 in words is "twenty-one billion, two hundred twenty-two million, thirty", and thus it is an aban number.