2001424121 has 4 divisors (see below), whose sum is σ = 2047968912. Its totient is φ = 1954879332.

The previous prime is 2001424063. The next prime is 2001424123. The reversal of 2001424121 is 1214241002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2001424121 - 2⁶ = 2001424057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001424121.

It is not an unprimeable number, because it can be changed into a prime (2001424123) 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, 23272331 + ... + 23272416.

It is an arithmetic number, because the mean of its divisors is an integer number (511992228).

Almost surely, 2^2001424121 is an apocalyptic number.

It is an amenable number.

2001424121 is a deficient number, since it is larger than the sum of its proper divisors (46544791).

2001424121 is an equidigital number, since it uses as much as digits as its factorization.

2001424121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46544790.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2001424121 is about 44737.2788734407. The cubic root of 2001424121 is about 1260.2200256141.

Adding to 2001424121 its reverse (1214241002), we get a palindrome (3215665123).

The spelling of 2001424121 in words is "two billion, one million, four hundred twenty-four thousand, one hundred twenty-one".