2001413123 has 4 divisors (see below), whose sum is σ = 2002149240. Its totient is φ = 2000677008.

The previous prime is 2001413119. The next prime is 2001413129. The reversal of 2001413123 is 3213141002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001413123 - 2² = 2001413119 is a prime.

It is a super-2 number, since 2×2001413123² = 8011308977833226258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001413129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363965 + ... + 369422.

It is an arithmetic number, because the mean of its divisors is an integer number (500537310).

Almost surely, 2^2001413123 is an apocalyptic number.

2001413123 is a deficient number, since it is larger than the sum of its proper divisors (736117).

2001413123 is an equidigital number, since it uses as much as digits as its factorization.

2001413123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736116.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2001413123 is about 44737.1559556483. The cubic root of 2001413123 is about 1260.2177172702.

Adding to 2001413123 its reverse (3213141002), we get a palindrome (5214554125).

The spelling of 2001413123 in words is "two billion, one million, four hundred thirteen thousand, one hundred twenty-three".