75076012021 has 2 divisors, whose sum is σ = 75076012022. Its totient is φ = 75076012020.

The previous prime is 75076012019. The next prime is 75076012049. The reversal of 75076012021 is 12021067057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68597371921 + 6478640100 = 261911^2 + 80490^2 .

It is a cyclic number.

It is not a de Polignac number, because 75076012021 - 2¹ = 75076012019 is a prime.

Together with 75076012019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75076012061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37538006010 + 37538006011.

It is an arithmetic number, because the mean of its divisors is an integer number (37538006011).

Almost surely, 2^75076012021 is an apocalyptic number.

It is an amenable number.

75076012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

75076012021 is an equidigital number, since it uses as much as digits as its factorization.

75076012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

Adding to 75076012021 its reverse (12021067057), we get a palindrome (87097079078).

The spelling of 75076012021 in words is "seventy-five billion, seventy-six million, twelve thousand, twenty-one".