4221384561629 has 2 divisors, whose sum is σ = 4221384561630. Its totient is φ = 4221384561628.

The previous prime is 4221384561617. The next prime is 4221384561631. The reversal of 4221384561629 is 9261654831224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3189788856004 + 1031595705625 = 1785998^2 + 1015675^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221384561629 - 2²⁸ = 4221116126173 is a prime.

It is a Sophie Germain prime.

Together with 4221384561631, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221384561529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110692280814 + 2110692280815.

It is an arithmetic number, because the mean of its divisors is an integer number (2110692280815).

Almost surely, 2^{4221384561629} is an apocalyptic number.

It is an amenable number.

4221384561629 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221384561629 is an equidigital number, since it uses as much as digits as its factorization.

4221384561629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 53.

The spelling of 4221384561629 in words is "four trillion, two hundred twenty-one billion, three hundred eighty-four million, five hundred sixty-one thousand, six hundred twenty-nine".