442111121 has 2 divisors, whose sum is σ = 442111122. Its totient is φ = 442111120.

The previous prime is 442111099. The next prime is 442111127. The reversal of 442111121 is 121111244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318122896 + 123988225 = 17836^2 + 11135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442111121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442111121.

It is not a weakly prime, because it can be changed into another prime (442111127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221055560 + 221055561.

It is an arithmetic number, because the mean of its divisors is an integer number (221055561).

Almost surely, 2^442111121 is an apocalyptic number.

It is an amenable number.

442111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

442111121 is an equidigital number, since it uses as much as digits as its factorization.

442111121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 17.

The square root of 442111121 is about 21026.4386190339. The cubic root of 442111121 is about 761.8049901336.

Adding to 442111121 its reverse (121111244), we get a palindrome (563222365).

The spelling of 442111121 in words is "four hundred forty-two million, one hundred eleven thousand, one hundred twenty-one".