2001122535 has 32 divisors (see below), whose sum is σ = 3265920000. Its totient is φ = 1046088576.

The previous prime is 2001122527. The next prime is 2001122549. The reversal of 2001122535 is 5352211002.

It is not a de Polignac number, because 2001122535 - 2³ = 2001122527 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 158641 + ... + 170789.

It is an arithmetic number, because the mean of its divisors is an integer number (102060000).

Almost surely, 2^2001122535 is an apocalyptic number.

2001122535 is a deficient number, since it is larger than the sum of its proper divisors (1264797465).

2001122535 is a wasteful number, since it uses less digits than its factorization.

2001122535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12375.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2001122535 is about 44733.9081123034. The cubic root of 2001122535 is about 1260.1567233877.

Adding to 2001122535 its reverse (5352211002), we get a palindrome (7353333537).

The spelling of 2001122535 in words is "two billion, one million, one hundred twenty-two thousand, five hundred thirty-five".