22221000021000 has 256 divisors, whose sum is σ = 76914112204800. Its totient is φ = 5295605088000.

The previous prime is 22221000020963. The next prime is 22221000021001. The reversal of 22221000021000 is 12000012222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22221000021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3759472 + ... + 7653471.

It is an arithmetic number, because the mean of its divisors is an integer number (300445750800).

Almost surely, 2^{22221000021000} is an apocalyptic number.

22221000021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221000021000 is an abundant number, since it is smaller than the sum of its proper divisors (54693112183800).

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

22221000021000 is a wasteful number, since it uses less digits than its factorization.

22221000021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11413037 (or 11413023 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22221000021000 its reverse (12000012222), we get a palindrome (22233000033222).

The spelling of 22221000021000 in words is "twenty-two trillion, two hundred twenty-one billion, twenty-one thousand".