2001120201 has 16 divisors (see below), whose sum is σ = 3139012800. Its totient is φ = 1255604544.

The previous prime is 2001120157. The next prime is 2001120203. The reversal of 2001120201 is 1020211002.

It is not a de Polignac number, because 2001120201 - 2⁶ = 2001120137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2001120203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179411 + ... + 2180328.

It is an arithmetic number, because the mean of its divisors is an integer number (196188300).

Almost surely, 2^2001120201 is an apocalyptic number.

It is an amenable number.

2001120201 is a deficient number, since it is larger than the sum of its proper divisors (1137892599).

2001120201 is a wasteful number, since it uses less digits than its factorization.

2001120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359765 (or 4359759 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2001120201 is about 44733.8820247025. The cubic root of 2001120201 is about 1260.1562334615.

Adding to 2001120201 its reverse (1020211002), we get a palindrome (3021331203).

The spelling of 2001120201 in words is "two billion, one million, one hundred twenty thousand, two hundred one".