75438121111 has 2 divisors, whose sum is σ = 75438121112. Its totient is φ = 75438121110.

The previous prime is 75438121091. The next prime is 75438121123. The reversal of 75438121111 is 11112183457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75438121111 - 2⁵ = 75438121079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75438128111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37719060555 + 37719060556.

It is an arithmetic number, because the mean of its divisors is an integer number (37719060556).

Almost surely, 2^75438121111 is an apocalyptic number.

75438121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

75438121111 is an equidigital number, since it uses as much as digits as its factorization.

75438121111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 34.

The spelling of 75438121111 in words is "seventy-five billion, four hundred thirty-eight million, one hundred twenty-one thousand, one hundred eleven".