2100040401 has 4 divisors (see below), whose sum is σ = 2800053872. Its totient is φ = 1400026932.

The previous prime is 2100040399. The next prime is 2100040441. The reversal of 2100040401 is 1040400012.

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 not a de Polignac number, because 2100040401 - 2¹ = 2100040399 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100040441) 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, 350006731 + ... + 350006736.

It is an arithmetic number, because the mean of its divisors is an integer number (700013468).

Almost surely, 2^2100040401 is an apocalyptic number.

It is an amenable number.

2100040401 is a deficient number, since it is larger than the sum of its proper divisors (700013471).

2100040401 is an equidigital number, since it uses as much as digits as its factorization.

2100040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700013470.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2100040401 is about 45826.1977584874. The cubic root of 2100040401 is about 1280.5873771061.

Adding to 2100040401 its reverse (1040400012), we get a palindrome (3140440413).

The spelling of 2100040401 in words is "two billion, one hundred million, forty thousand, four hundred one".