2421220401 has 12 divisors (see below), whose sum is σ = 3498005940. Its totient is φ = 1613829600.

The previous prime is 2421220397. The next prime is 2421220421. The reversal of 2421220401 is 1040221242.

2421220401 is a `hidden beast` number, since 2 + 42 + 1 + 220 + 401 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2277580176 + 143640225 = 47724^2 + 11985^2 .

It is not a de Polignac number, because 2421220401 - 2² = 2421220397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2421220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27715 + ... + 74903.

It is an arithmetic number, because the mean of its divisors is an integer number (291500495).

Almost surely, 2^2421220401 is an apocalyptic number.

It is an amenable number.

2421220401 is a deficient number, since it is larger than the sum of its proper divisors (1076785539).

2421220401 is a wasteful number, since it uses less digits than its factorization.

2421220401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52896 (or 52893 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2421220401 is about 49205.8980306223. The cubic root of 2421220401 is about 1342.8003368709.

Adding to 2421220401 its reverse (1040221242), we get a palindrome (3461441643).

The spelling of 2421220401 in words is "two billion, four hundred twenty-one million, two hundred twenty thousand, four hundred one".