2121112220000 has 120 divisors (see below), whose sum is σ = 5291754309072. Its totient is φ = 836494400000.

The previous prime is 2121112219987. The next prime is 2121112220011. The reversal of 2121112220000 is 222111212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 673130 + ... + 2166870.

Almost surely, 2^{2121112220000} is an apocalyptic number.

2121112220000 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 2121112220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2645877154536).

2121112220000 is an abundant number, since it is smaller than the sum of its proper divisors (3170642089072).

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

2121112220000 is an equidigital number, since it uses as much as digits as its factorization.

2121112220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493842 (or 1493819 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121112220000 its reverse (222111212), we get a palindrome (2121334331212).

The spelling of 2121112220000 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand".