4221845129 has 2 divisors, whose sum is σ = 4221845130. Its totient is φ = 4221845128.

The previous prime is 4221845057. The next prime is 4221845183. The reversal of 4221845129 is 9215481224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4013475904 + 208369225 = 63352^2 + 14435^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221845129 - 2⁸ = 4221844873 is a prime.

It is a super-2 number, since 2×4221845129² = 35647952586522053282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4221845092 and 4221845101.

It is not a weakly prime, because it can be changed into another prime (4221845189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110922564 + 2110922565.

It is an arithmetic number, because the mean of its divisors is an integer number (2110922565).

Almost surely, 2^4221845129 is an apocalyptic number.

It is an amenable number.

4221845129 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221845129 is an equidigital number, since it uses as much as digits as its factorization.

4221845129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 4221845129 is about 64975.7272294816. The cubic root of 4221845129 is about 1616.2210766770.

The spelling of 4221845129 in words is "four billion, two hundred twenty-one million, eight hundred forty-five thousand, one hundred twenty-nine".