2401021021 has 18 divisors (see below), whose sum is σ = 2886084990. Its totient is φ = 1991591280.

The previous prime is 2401021019. The next prime is 2401021067. The reversal of 2401021021 is 1201201042.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2076624900 + 324396121 = 45570^2 + 18011^2 .

It is not a de Polignac number, because 2401021021 - 2¹ = 2401021019 is a prime.

It is a Duffinian number.

2401021021 is a modest number, since divided by 21021 gives 2401 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 2401020992 and 2401021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2401021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21595 + ... + 72583.

It is an arithmetic number, because the mean of its divisors is an integer number (160338055).

Almost surely, 2^2401021021 is an apocalyptic number.

It is an amenable number.

2401021021 is a deficient number, since it is larger than the sum of its proper divisors (485063969).

2401021021 is an equidigital number, since it uses as much as digits as its factorization.

2401021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51065 (or 51027 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2401021021 is about 49000.2144995305. The cubic root of 2401021021 is about 1339.0557357744.

Adding to 2401021021 its reverse (1201201042), we get a palindrome (3602222063).

The spelling of 2401021021 in words is "two billion, four hundred one million, twenty-one thousand, twenty-one".