21120220220000 has 240 divisors, whose sum is σ = 56694297667392. Its totient is φ = 7678474560000.

The previous prime is 21120220219993. The next prime is 21120220220039. The reversal of 21120220220000 is 2202202112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1730733899 + ... + 1730746101.

Almost surely, 2^{21120220220000} is an apocalyptic number.

21120220220000 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 21120220220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28347148833696).

21120220220000 is an abundant number, since it is smaller than the sum of its proper divisors (35574077447392).

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

21120220220000 is a wasteful number, since it uses less digits than its factorization.

21120220220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20111 (or 20088 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21120220220000 its reverse (2202202112), we get a palindrome (21122422422112).

The spelling of 21120220220000 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty thousand".