2421032021 has 4 divisors (see below), whose sum is σ = 2445991212. Its totient is φ = 2396072832.

The previous prime is 2421031981. The next prime is 2421032147. The reversal of 2421032021 is 1202301242.

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 404572996 + 2016459025 = 20114^2 + 44905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2421032021 is a prime.

It is a super-2 number, since 2×2421032021² = 11722792093414688882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421032221) 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 3 ways as a sum of consecutive naturals, for example, 12479450 + ... + 12479643.

It is an arithmetic number, because the mean of its divisors is an integer number (611497803).

Almost surely, 2^2421032021 is an apocalyptic number.

It is an amenable number.

2421032021 is a deficient number, since it is larger than the sum of its proper divisors (24959191).

2421032021 is an equidigital number, since it uses as much as digits as its factorization.

2421032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24959190.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2421032021 is about 49203.9837919655. The cubic root of 2421032021 is about 1342.7655110054.

Adding to 2421032021 its reverse (1202301242), we get a palindrome (3623333263).

The spelling of 2421032021 in words is "two billion, four hundred twenty-one million, thirty-two thousand, twenty-one".