21213312222030 has 128 divisors (see below), whose sum is σ = 51766025740416. Its totient is φ = 5562482688000.

The previous prime is 21213312222007. The next prime is 21213312222061. The reversal of 21213312222030 is 3022221331212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 984046012 + ... + 984067568.

It is an arithmetic number, because the mean of its divisors is an integer number (404422076097).

Almost surely, 2^{21213312222030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21213312222030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25883012870208).

21213312222030 is an abundant number, since it is smaller than the sum of its proper divisors (30552713518386).

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

21213312222030 is a wasteful number, since it uses less digits than its factorization.

21213312222030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22982.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21213312222030 its reverse (3022221331212), we get a palindrome (24235533553242).

The spelling of 21213312222030 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twelve million, two hundred twenty-two thousand, thirty".