2001122997 has 24 divisors (see below), whose sum is σ = 2822167584. Its totient is φ = 1261093536.

The previous prime is 2001122987. The next prime is 2001123013. The reversal of 2001122997 is 7992211002.

It is not a de Polignac number, because 2001122997 - 2⁸ = 2001122741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001122927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564643 + ... + 568175.

It is an arithmetic number, because the mean of its divisors is an integer number (117590316).

Almost surely, 2^2001122997 is an apocalyptic number.

It is an amenable number.

2001122997 is a deficient number, since it is larger than the sum of its proper divisors (821044587).

2001122997 is a wasteful number, since it uses less digits than its factorization.

2001122997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097 (or 4078 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 2001122997 is about 44733.9132761711. The cubic root of 2001122997 is about 1260.1568203653.

Adding to 2001122997 its reverse (7992211002), we get a palindrome (9993333999).

The spelling of 2001122997 in words is "two billion, one million, one hundred twenty-two thousand, nine hundred ninety-seven".