4233431431021 has 16 divisors (see below), whose sum is σ = 4582706486400. Its totient is φ = 3887537734080.

The previous prime is 4233431430997. The next prime is 4233431431057. The reversal of 4233431431021 is 1201341343324.

It is not a de Polignac number, because 4233431431021 - 2⁹ = 4233431430509 is a prime.

It is a super-2 number, since 2×4233431431021² (a number of 26 digits) 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 (4233431431081) 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, 16853811 + ... + 17103151.

It is an arithmetic number, because the mean of its divisors is an integer number (286419155400).

Almost surely, 2^{4233431431021} is an apocalyptic number.

It is an amenable number.

4233431431021 is a deficient number, since it is larger than the sum of its proper divisors (349275055379).

4233431431021 is a wasteful number, since it uses less digits than its factorization.

4233431431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256116.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 4233431431021 its reverse (1201341343324), we get a palindrome (5434772774345).

The spelling of 4233431431021 in words is "four trillion, two hundred thirty-three billion, four hundred thirty-one million, four hundred thirty-one thousand, twenty-one".