4321144312021 has 2 divisors, whose sum is σ = 4321144312022. Its totient is φ = 4321144312020.

The previous prime is 4321144311983. The next prime is 4321144312039. The reversal of 4321144312021 is 1202134411234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3912836091921 + 408308220100 = 1978089^2 + 638990^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321144312021 - 2⁷ = 4321144311893 is a prime.

It is a super-2 number, since 2×4321144312021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4321144312081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160572156010 + 2160572156011.

It is an arithmetic number, because the mean of its divisors is an integer number (2160572156011).

Almost surely, 2^{4321144312021} is an apocalyptic number.

It is an amenable number.

4321144312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4321144312021 is an equidigital number, since it uses as much as digits as its factorization.

4321144312021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 4321144312021 its reverse (1202134411234), we get a palindrome (5523278723255).

The spelling of 4321144312021 in words is "four trillion, three hundred twenty-one billion, one hundred forty-four million, three hundred twelve thousand, twenty-one".