2221121122000 has 160 divisors (see below), whose sum is σ = 5912671564800. Its totient is φ = 800269632000.

The previous prime is 2221121121979. The next prime is 2221121122007. The reversal of 2221121122000 is 2211211222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121122007) 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, 1934881 + ... + 2861119.

It is an arithmetic number, because the mean of its divisors is an integer number (36954197280).

Almost surely, 2^{2221121122000} is an apocalyptic number.

2221121122000 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 2221121122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2956335782400).

2221121122000 is an abundant number, since it is smaller than the sum of its proper divisors (3691550442800).

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

2221121122000 is a wasteful number, since it uses less digits than its factorization.

2221121122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926382 (or 926366 counting only the distinct ones).

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

Adding to 2221121122000 its reverse (2211211222), we get a palindrome (2223332333222).

The spelling of 2221121122000 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand".