4221555101 has 2 divisors, whose sum is σ = 4221555102. Its totient is φ = 4221555100.

The previous prime is 4221555089. The next prime is 4221555103. The reversal of 4221555101 is 1015551224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3594002500 + 627552601 = 59950^2 + 25051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221555101 is a prime.

Together with 4221555103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221555103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110777550 + 2110777551.

It is an arithmetic number, because the mean of its divisors is an integer number (2110777551).

Almost surely, 2^4221555101 is an apocalyptic number.

It is an amenable number.

4221555101 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221555101 is an equidigital number, since it uses as much as digits as its factorization.

4221555101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 4221555101 is about 64973.4953731135. The cubic root of 4221555101 is about 1616.1840659951.

The spelling of 4221555101 in words is "four billion, two hundred twenty-one million, five hundred fifty-five thousand, one hundred one".