4044157121 has 2 divisors, whose sum is σ = 4044157122. Its totient is φ = 4044157120.

The previous prime is 4044157109. The next prime is 4044157123. The reversal of 4044157121 is 1217514404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3158440000 + 885717121 = 56200^2 + 29761^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044157121 - 2¹⁰ = 4044156097 is a prime.

Together with 4044157123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4044157123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022078560 + 2022078561.

It is an arithmetic number, because the mean of its divisors is an integer number (2022078561).

Almost surely, 2^4044157121 is an apocalyptic number.

It is an amenable number.

4044157121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044157121 is an equidigital number, since it uses as much as digits as its factorization.

4044157121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 4044157121 is about 63593.6877449327. The cubic root of 4044157121 is about 1593.2209434398.

The spelling of 4044157121 in words is "four billion, forty-four million, one hundred fifty-seven thousand, one hundred twenty-one".