121513374667 has 2 divisors, whose sum is σ = 121513374668. Its totient is φ = 121513374666.

The previous prime is 121513374641. The next prime is 121513374679. The reversal of 121513374667 is 766473315121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121513374667 - 2¹¹ = 121513372619 is a prime.

It is not a weakly prime, because it can be changed into another prime (121513374167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60756687333 + 60756687334.

It is an arithmetic number, because the mean of its divisors is an integer number (60756687334).

Almost surely, 2^121513374667 is an apocalyptic number.

121513374667 is a deficient number, since it is larger than the sum of its proper divisors (1).

121513374667 is an equidigital number, since it uses as much as digits as its factorization.

121513374667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 46.

Adding to 121513374667 its reverse (766473315121), we get a palindrome (887986689788).

The spelling of 121513374667 in words is "one hundred twenty-one billion, five hundred thirteen million, three hundred seventy-four thousand, six hundred sixty-seven".