4321977221 has 2 divisors, whose sum is σ = 4321977222. Its totient is φ = 4321977220.

The previous prime is 4321977217. The next prime is 4321977353. The reversal of 4321977221 is 1227791234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3459086596 + 862890625 = 58814^2 + 29375^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321977221 - 2² = 4321977217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4321977211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160988610 + 2160988611.

It is an arithmetic number, because the mean of its divisors is an integer number (2160988611).

Almost surely, 2^4321977221 is an apocalyptic number.

It is an amenable number.

4321977221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4321977221 is an equidigital number, since it uses as much as digits as its factorization.

4321977221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 4321977221 is about 65741.7464097205. The cubic root of 4321977221 is about 1628.8990044437.

The spelling of 4321977221 in words is "four billion, three hundred twenty-one million, nine hundred seventy-seven thousand, two hundred twenty-one".