2221021111000 has 64 divisors (see below), whose sum is σ = 5201819981280. Its totient is φ = 887616892800.

The previous prime is 2221021110991. The next prime is 2221021111019. The reversal of 2221021111000 is 1111201222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134122 + ... + 2111878.

Almost surely, 2^{2221021111000} is an apocalyptic number.

2221021111000 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 2221021111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2600909990640).

2221021111000 is an abundant number, since it is smaller than the sum of its proper divisors (2980798870280).

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

2221021111000 is a wasteful number, since it uses less digits than its factorization.

2221021111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978901 (or 1978887 counting only the distinct ones).

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

Adding to 2221021111000 its reverse (1111201222), we get a palindrome (2222132312222).

The spelling of 2221021111000 in words is "two trillion, two hundred twenty-one billion, twenty-one million, one hundred eleven thousand".