2001222001200 has 60 divisors (see below), whose sum is σ = 6410581147688. Its totient is φ = 533659200000.

The previous prime is 2001222001133. The next prime is 2001222001211. The reversal of 2001222001200 is 21002221002.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833841301 + ... + 833843700.

Almost surely, 2^{2001222001200} is an apocalyptic number.

2001222001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001222001200 is an abundant number, since it is smaller than the sum of its proper divisors (4409359146488).

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

2001222001200 is a wasteful number, since it uses less digits than its factorization.

2001222001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667685022 (or 1667685011 counting only the distinct ones).

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

Adding to 2001222001200 its reverse (21002221002), we get a palindrome (2022224222202).

The spelling of 2001222001200 in words is "two trillion, one billion, two hundred twenty-two million, one thousand, two hundred".