2221021002000 has 160 divisors (see below), whose sum is σ = 7312925228544. Its totient is φ = 579670656000.

The previous prime is 2221021001993. The next prime is 2221021002007. The reversal of 2221021002000 is 2001201222.

It is an interprime number because it is at equal distance from previous prime (2221021001993) and next prime (2221021002007).

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 (2221021002007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3655981 + ... + 4219980.

Almost surely, 2^{2221021002000} is an apocalyptic number.

2221021002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221021002000 is an abundant number, since it is smaller than the sum of its proper divisors (5091904226544).

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

2221021002000 is a wasteful number, since it uses less digits than its factorization.

2221021002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876034 (or 7876018 counting only the distinct ones).

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

Adding to 2221021002000 its reverse (2001201222), we get a palindrome (2223022203222).

The spelling of 2221021002000 in words is "two trillion, two hundred twenty-one billion, twenty-one million, two thousand".