4201440421 has 2 divisors, whose sum is σ = 4201440422. Its totient is φ = 4201440420.

The previous prime is 4201440359. The next prime is 4201440427. The reversal of 4201440421 is 1240441024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3483950625 + 717489796 = 59025^2 + 26786^2 .

It is a cyclic number.

It is not a de Polignac number, because 4201440421 - 2²⁵ = 4167885989 is a prime.

It is a super-2 number, since 2×4201440421² = 35304203222425314482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4201440392 and 4201440401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4201440427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100720210 + 2100720211.

It is an arithmetic number, because the mean of its divisors is an integer number (2100720211).

Almost surely, 2^4201440421 is an apocalyptic number.

It is an amenable number.

4201440421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4201440421 is an equidigital number, since it uses as much as digits as its factorization.

4201440421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4201440421 is about 64818.5191206957. The cubic root of 4201440421 is about 1613.6130706971.

Adding to 4201440421 its reverse (1240441024), we get a palindrome (5441881445).

The spelling of 4201440421 in words is "four billion, two hundred one million, four hundred forty thousand, four hundred twenty-one".