2113122001 has 4 divisors (see below), whose sum is σ = 2164661604. Its totient is φ = 2061582400.

The previous prime is 2113121999. The next prime is 2113122007. The reversal of 2113122001 is 1002213112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 482900625 + 1630221376 = 21975^2 + 40376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113122001 - 2¹ = 2113121999 is a prime.

It is a super-3 number, since 3×2113122001³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113122007) 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, 25769740 + ... + 25769821.

It is an arithmetic number, because the mean of its divisors is an integer number (541165401).

Almost surely, 2^2113122001 is an apocalyptic number.

It is an amenable number.

2113122001 is a deficient number, since it is larger than the sum of its proper divisors (51539603).

2113122001 is an equidigital number, since it uses as much as digits as its factorization.

2113122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51539602.

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

The square root of 2113122001 is about 45968.7067579674. The cubic root of 2113122001 is about 1283.2408923276.

Adding to 2113122001 its reverse (1002213112), we get a palindrome (3115335113).

The spelling of 2113122001 in words is "two billion, one hundred thirteen million, one hundred twenty-two thousand, one".