4301872121 has 2 divisors, whose sum is σ = 4301872122. Its totient is φ = 4301872120.

The previous prime is 4301872103. The next prime is 4301872123. The reversal of 4301872121 is 1212781034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3342111721 + 959760400 = 57811^2 + 30980^2 .

It is a cyclic number.

It is not a de Polignac number, because 4301872121 - 2²² = 4297677817 is a prime.

It is a super-2 number, since 2×4301872121² = 37012207490874077282, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 4301872123, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4301872123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2150936060 + 2150936061.

It is an arithmetic number, because the mean of its divisors is an integer number (2150936061).

Almost surely, 2^4301872121 is an apocalyptic number.

It is an amenable number.

4301872121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4301872121 is an equidigital number, since it uses as much as digits as its factorization.

4301872121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 4301872121 is about 65588.6584784290. The cubic root of 4301872121 is about 1626.3692911100.

The spelling of 4301872121 in words is "four billion, three hundred one million, eight hundred seventy-two thousand, one hundred twenty-one".