121021242120127 has 2 divisors, whose sum is σ = 121021242120128. Its totient is φ = 121021242120126.

The previous prime is 121021242120067. The next prime is 121021242120169. The reversal of 121021242120127 is 721021242120121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021242120127 is a prime.

It is a super-2 number, since 2×121021242120127² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121021242120095 and 121021242120104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121021242120197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510621060063 + 60510621060064.

It is an arithmetic number, because the mean of its divisors is an integer number (60510621060064).

Almost surely, 2^{121021242120127} is an apocalyptic number.

121021242120127 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021242120127 is an equidigital number, since it uses as much as digits as its factorization.

121021242120127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 121021242120127 its reverse (721021242120121), we get a palindrome (842042484240248).

The spelling of 121021242120127 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred forty-two million, one hundred twenty thousand, one hundred twenty-seven".