2421332021 has 16 divisors (see below), whose sum is σ = 2513617920. Its totient is φ = 2330926080.

The previous prime is 2421331999. The next prime is 2421332027. The reversal of 2421332021 is 1202331242.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2421332021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2421331984 and 2421332002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421332027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926765 + ... + 929373.

It is an arithmetic number, because the mean of its divisors is an integer number (157101120).

Almost surely, 2^2421332021 is an apocalyptic number.

It is an amenable number.

2421332021 is a deficient number, since it is larger than the sum of its proper divisors (92285899).

2421332021 is a wasteful number, since it uses less digits than its factorization.

2421332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2421332021 is about 49207.0322311761. The cubic root of 2421332021 is about 1342.8209712405.

Adding to 2421332021 its reverse (1202331242), we get a palindrome (3623663263).

The spelling of 2421332021 in words is "two billion, four hundred twenty-one million, three hundred thirty-two thousand, twenty-one".