127604916121 has 2 divisors, whose sum is σ = 127604916122. Its totient is φ = 127604916120.

The previous prime is 127604916091. The next prime is 127604916133. The reversal of 127604916121 is 121619406721.

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., 94867080025 + 32737836096 = 308005^2 + 180936^2 .

It is a cyclic number.

It is not a de Polignac number, because 127604916121 - 2¹⁹ = 127604391833 is a prime.

It is a super-3 number, since 3×127604916121³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (127604916181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63802458060 + 63802458061.

It is an arithmetic number, because the mean of its divisors is an integer number (63802458061).

Almost surely, 2^127604916121 is an apocalyptic number.

It is an amenable number.

127604916121 is a deficient number, since it is larger than the sum of its proper divisors (1).

127604916121 is an equidigital number, since it uses as much as digits as its factorization.

127604916121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 127604916121 in words is "one hundred twenty-seven billion, six hundred four million, nine hundred sixteen thousand, one hundred twenty-one".