2221200001000 has 32 divisors (see below), whose sum is σ = 5197608004680. Its totient is φ = 888480000000.

The previous prime is 2221200000989. The next prime is 2221200001019. The reversal of 2221200001000 is 1000021222.

It can be written as a sum of positive squares in 4 ways, for example, as 158351468356 + 2062848532644 = 397934^2 + 1436262^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110599001 + ... + 1110601000.

Almost surely, 2^{2221200001000} is an apocalyptic number.

2221200001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221200001000 is an abundant number, since it is smaller than the sum of its proper divisors (2976408003680).

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

2221200001000 is a wasteful number, since it uses less digits than its factorization.

2221200001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221200022 (or 2221200008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2221200001000 its reverse (1000021222), we get a palindrome (2222200022222).

The spelling of 2221200001000 in words is "two trillion, two hundred twenty-one billion, two hundred million, one thousand".