2112021021220 has 192 divisors, whose sum is σ = 5178225024000. Its totient is φ = 715060224000.

The previous prime is 2112021021193. The next prime is 2112021021241. The reversal of 2112021021220 is 221201202112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2112021021194 and 2112021021203.

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, 755100862 + ... + 755103658.

It is an arithmetic number, because the mean of its divisors is an integer number (26969922000).

Almost surely, 2^{2112021021220} is an apocalyptic number.

2112021021220 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 2112021021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589112512000).

2112021021220 is an abundant number, since it is smaller than the sum of its proper divisors (3066204002780).

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

2112021021220 is a wasteful number, since it uses less digits than its factorization.

2112021021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934 (or 4932 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2112021021220 its reverse (221201202112), we get a palindrome (2333222223332).

The spelling of 2112021021220 in words is "two trillion, one hundred twelve billion, twenty-one million, twenty-one thousand, two hundred twenty".