2001123099975 has 24 divisors (see below), whose sum is σ = 3309358028800. Its totient is φ = 1066996458720.

The previous prime is 2001123099917. The next prime is 2001123100003. The reversal of 2001123099975 is 5799903211002.

It is not a de Polignac number, because 2001123099975 - 2⁸ = 2001123099719 is a prime.

It is a super-2 number, since 2×2001123099975² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3065425 + ... + 3660474.

Almost surely, 2^{2001123099975} is an apocalyptic number.

2001123099975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2001123099975 is a deficient number, since it is larger than the sum of its proper divisors (1308234928825).

2001123099975 is a wasteful number, since it uses less digits than its factorization.

2001123099975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6729879 (or 6729874 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 48.

The spelling of 2001123099975 in words is "two trillion, one billion, one hundred twenty-three million, ninety-nine thousand, nine hundred seventy-five".