2001222200187 has 12 divisors (see below), whose sum is σ = 3303604902000. Its totient is φ = 1143555542928.

The previous prime is 2001222200179. The next prime is 2001222200189. The reversal of 2001222200187 is 7810022221002.

It is not a de Polignac number, because 2001222200187 - 2³ = 2001222200179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001222200187.

It is not an unprimeable number, because it can be changed into a prime (2001222200189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15882715812 + ... + 15882715937.

It is an arithmetic number, because the mean of its divisors is an integer number (275300408500).

Almost surely, 2^{2001222200187} is an apocalyptic number.

2001222200187 is a deficient number, since it is larger than the sum of its proper divisors (1302382701813).

2001222200187 is a wasteful number, since it uses less digits than its factorization.

2001222200187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31765431762 (or 31765431759 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

Adding to 2001222200187 its reverse (7810022221002), we get a palindrome (9811244421189).

The spelling of 2001222200187 in words is "two trillion, one billion, two hundred twenty-two million, two hundred thousand, one hundred eighty-seven".