21330122013330 has 128 divisors (see below), whose sum is σ = 55214646423552. Its totient is φ = 5242449593088.

The previous prime is 21330122013329. The next prime is 21330122013341. The reversal of 21330122013330 is 3331022103312.

It is a self number, because there is not a number n which added to its sum of digits gives 21330122013330.

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, 1239898509 + ... + 1239915711.

It is an arithmetic number, because the mean of its divisors is an integer number (431364425184).

Almost surely, 2^{21330122013330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330122013330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27607323211776).

21330122013330 is an abundant number, since it is smaller than the sum of its proper divisors (33884524410222).

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

21330122013330 is a wasteful number, since it uses less digits than its factorization.

21330122013330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21912.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21330122013330 its reverse (3331022103312), we get a palindrome (24661144116642).

The spelling of 21330122013330 in words is "twenty-one trillion, three hundred thirty billion, one hundred twenty-two million, thirteen thousand, three hundred thirty".