2001122201 has 8 divisors (see below), whose sum is σ = 2155521984. Its totient is φ = 1846789200.

The previous prime is 2001122143. The next prime is 2001122251. The reversal of 2001122201 is 1022211002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001122201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001122251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57926 + ... + 85776.

It is an arithmetic number, because the mean of its divisors is an integer number (269440248).

Almost surely, 2^2001122201 is an apocalyptic number.

It is an amenable number.

2001122201 is a deficient number, since it is larger than the sum of its proper divisors (154399783).

2001122201 is a wasteful number, since it uses less digits than its factorization.

2001122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33391.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2001122201 is about 44733.9043791172. The cubic root of 2001122201 is about 1260.1566532783.

Adding to 2001122201 its reverse (1022211002), we get a palindrome (3023333203).

The spelling of 2001122201 in words is "two billion, one million, one hundred twenty-two thousand, two hundred one".