2001000221000 has 64 divisors (see below), whose sum is σ = 5108007864960. Its totient is φ = 727636440000.

The previous prime is 2001000220907. The next prime is 2001000221021. The reversal of 2001000221000 is 1220001002.

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 90943556 + ... + 90965555.

It is an arithmetic number, because the mean of its divisors is an integer number (79812622890).

Almost surely, 2^{2001000221000} is an apocalyptic number.

2001000221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001000221000 is an abundant number, since it is smaller than the sum of its proper divisors (3107007643960).

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

2001000221000 is a wasteful number, since it uses less digits than its factorization.

2001000221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181909143 (or 181909129 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 2001000221000 its reverse (1220001002), we get a palindrome (2002220222002).

The spelling of 2001000221000 in words is "two trillion, one billion, two hundred twenty-one thousand".