2220121111000 has 128 divisors (see below), whose sum is σ = 5621227335360. Its totient is φ = 815851008000.

The previous prime is 2220121110947. The next prime is 2220121111003. The reversal of 2220121111000 is 1111210222.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220121111003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2338312 + ... + 3147688.

Almost surely, 2^{2220121111000} is an apocalyptic number.

2220121111000 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 2220121111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2810613667680).

2220121111000 is an abundant number, since it is smaller than the sum of its proper divisors (3401106224360).

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

2220121111000 is a wasteful number, since it uses less digits than its factorization.

2220121111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809622 (or 809608 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2220121111000 its reverse (1111210222), we get a palindrome (2221232321222).

The spelling of 2220121111000 in words is "two trillion, two hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand".