2120040401 has 4 divisors (see below), whose sum is σ = 2120268900. Its totient is φ = 2119811904.

The previous prime is 2120040397. The next prime is 2120040409. The reversal of 2120040401 is 1040400212.

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 1156000000 + 964040401 = 34000^2 + 31049^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120040401 - 2² = 2120040397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120040409) 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, 99716 + ... + 119093.

It is an arithmetic number, because the mean of its divisors is an integer number (530067225).

Almost surely, 2^2120040401 is an apocalyptic number.

It is an amenable number.

2120040401 is a deficient number, since it is larger than the sum of its proper divisors (228499).

2120040401 is an equidigital number, since it uses as much as digits as its factorization.

2120040401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228498.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2120040401 is about 46043.8964576197. The cubic root of 2120040401 is about 1284.6398181015.

Adding to 2120040401 its reverse (1040400212), we get a palindrome (3160440613).

The spelling of 2120040401 in words is "two billion, one hundred twenty million, forty thousand, four hundred one".