4233621021 has 48 divisors (see below), whose sum is σ = 7059317760. Its totient is φ = 2243052000.

The previous prime is 4233621019. The next prime is 4233621031. The reversal of 4233621021 is 1201263324.

It is not a de Polignac number, because 4233621021 - 2¹ = 4233621019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4233620982 and 4233621000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4233621001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 115146 + ... + 147396.

It is an arithmetic number, because the mean of its divisors is an integer number (147069120).

Almost surely, 2^4233621021 is an apocalyptic number.

It is an amenable number.

4233621021 is a deficient number, since it is larger than the sum of its proper divisors (2825696739).

4233621021 is a wasteful number, since it uses less digits than its factorization.

4233621021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32334 (or 32327 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 4233621021 is about 65066.2817517645. The cubic root of 4233621021 is about 1617.7223773370.

Adding to 4233621021 its reverse (1201263324), we get a palindrome (5434884345).

The spelling of 4233621021 in words is "four billion, two hundred thirty-three million, six hundred twenty-one thousand, twenty-one".