1375123111 has 2 divisors, whose sum is σ = 1375123112. Its totient is φ = 1375123110.

The previous prime is 1375123091. The next prime is 1375123117. The reversal of 1375123111 is 1113215731.

It is a strong prime.

It is an emirp because it is prime and its reverse (1113215731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375123111 - 2²¹ = 1373025959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375123117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687561555 + 687561556.

It is an arithmetic number, because the mean of its divisors is an integer number (687561556).

Almost surely, 2^1375123111 is an apocalyptic number.

1375123111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375123111 is an equidigital number, since it uses as much as digits as its factorization.

1375123111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 25.

The square root of 1375123111 is about 37082.6524267076. The cubic root of 1375123111 is about 1112.0232317382.

Adding to 1375123111 its reverse (1113215731), we get a palindrome (2488338842).

The spelling of 1375123111 in words is "one billion, three hundred seventy-five million, one hundred twenty-three thousand, one hundred eleven".