4612145221 has 2 divisors, whose sum is σ = 4612145222. Its totient is φ = 4612145220.

The previous prime is 4612145189. The next prime is 4612145261. The reversal of 4612145221 is 1225412164.

4612145221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4030853121 + 581292100 = 63489^2 + 24110^2 .

It is a cyclic number.

It is not a de Polignac number, because 4612145221 - 2⁵ = 4612145189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4612145221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4612145261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2306072610 + 2306072611.

It is an arithmetic number, because the mean of its divisors is an integer number (2306072611).

Almost surely, 2^4612145221 is an apocalyptic number.

It is an amenable number.

4612145221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4612145221 is an equidigital number, since it uses as much as digits as its factorization.

4612145221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 4612145221 is about 67912.7765667109. The cubic root of 4612145221 is about 1664.5658907881.

Adding to 4612145221 its reverse (1225412164), we get a palindrome (5837557385).

The spelling of 4612145221 in words is "four billion, six hundred twelve million, one hundred forty-five thousand, two hundred twenty-one".