2001012001123 has 8 divisors (see below), whose sum is σ = 2026392478400. Its totient is φ = 1975632804288.

The previous prime is 2001012001081. The next prime is 2001012001127. The reversal of 2001012001123 is 3211002101002.

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-2001012001123 is a prime.

It is a super-2 number, since 2×2001012001123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001012001127) 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, 3048583 + ... + 3646351.

It is an arithmetic number, because the mean of its divisors is an integer number (253299059800).

Almost surely, 2^{2001012001123} is an apocalyptic number.

2001012001123 is a deficient number, since it is larger than the sum of its proper divisors (25380477277).

2001012001123 is an equidigital number, since it uses as much as digits as its factorization.

2001012001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640221.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2001012001123 its reverse (3211002101002), we get a palindrome (5212014102125).

The spelling of 2001012001123 in words is "two trillion, one billion, twelve million, one thousand, one hundred twenty-three".