4233420220421 has 6 divisors (see below), whose sum is σ = 4924590868710. Its totient is φ = 3628645903176.

The previous prime is 4233420220417. The next prime is 4233420220427. The reversal of 4233420220421 is 1240220243324.

It can be written as a sum of positive squares in only one way, i.e., 3975138750625 + 258281469796 = 1993775^2 + 508214^2 .

It is not a de Polignac number, because 4233420220421 - 2² = 4233420220417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4233420220427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43198165466 + ... + 43198165563.

It is an arithmetic number, because the mean of its divisors is an integer number (820765144785).

Almost surely, 2^{4233420220421} is an apocalyptic number.

It is an amenable number.

4233420220421 is a deficient number, since it is larger than the sum of its proper divisors (691170648289).

4233420220421 is an equidigital number, since it uses as much as digits as its factorization.

4233420220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86396331043 (or 86396331036 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 4233420220421 its reverse (1240220243324), we get a palindrome (5473640463745).

The spelling of 4233420220421 in words is "four trillion, two hundred thirty-three billion, four hundred twenty million, two hundred twenty thousand, four hundred twenty-one".