2111222221000 has 192 divisors, whose sum is σ = 5221125702000. Its totient is φ = 798942643200.

The previous prime is 2111222220979. The next prime is 2111222221013. The reversal of 2111222221000 is 1222221112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1012595413284 + 1098626807716 = 1006278^2 + 1048154^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292045386 + ... + 292052614.

Almost surely, 2^{2111222221000} is an apocalyptic number.

2111222221000 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 2111222221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610562851000).

2111222221000 is an abundant number, since it is smaller than the sum of its proper divisors (3109903481000).

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

2111222221000 is a wasteful number, since it uses less digits than its factorization.

2111222221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097 (or 8064 counting only the distinct ones).

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

Adding to 2111222221000 its reverse (1222221112), we get a palindrome (2112444442112).

The spelling of 2111222221000 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-one thousand".