22121320030000 has 100 divisors (see below), whose sum is σ = 53562127976280. Its totient is φ = 8847834112000.

The previous prime is 22121320029971. The next prime is 22121320030003. The reversal of 22121320030000 is 3002312122.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (22121320030003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 138510192 + ... + 138669808.

Almost surely, 2^{22121320030000} is an apocalyptic number.

22121320030000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121320030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26781063988140).

22121320030000 is an abundant number, since it is smaller than the sum of its proper divisors (31440807946280).

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

22121320030000 is a wasteful number, since it uses less digits than its factorization.

22121320030000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173504 (or 173483 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 22121320030000 its reverse (3002312122), we get a palindrome (22124322342122).

The spelling of 22121320030000 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred twenty million, thirty thousand".