2220121200000 has 768 divisors, whose sum is σ = 8146728576000. Its totient is φ = 531148800000.

The previous prime is 2220121199969. The next prime is 2220121200007. The reversal of 2220121200000 is 21210222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220121200007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1042798936 + ... + 1042801064.

It is an arithmetic number, because the mean of its divisors is an integer number (10607719500).

Almost surely, 2^{2220121200000} is an apocalyptic number.

2220121200000 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 2220121200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4073364288000).

2220121200000 is an abundant number, since it is smaller than the sum of its proper divisors (5926607376000).

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

2220121200000 is an equidigital number, since it uses as much as digits as its factorization.

2220121200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2220121200000 its reverse (21210222), we get a palindrome (2220142410222).

The spelling of 2220121200000 in words is "two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand".