121513374747 has 16 divisors (see below), whose sum is σ = 180025182880. Its totient is φ = 81006500736.

The previous prime is 121513374739. The next prime is 121513374769. The reversal of 121513374747 is 747473315121.

121513374747 is a `hidden beast` number, since 1 + 21 + 513 + 3 + 74 + 7 + 47 = 666.

It is not a de Polignac number, because 121513374747 - 2³ = 121513374739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121513374247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734063 + ... + 1802775.

It is an arithmetic number, because the mean of its divisors is an integer number (11251573930).

Almost surely, 2^121513374747 is an apocalyptic number.

121513374747 is a deficient number, since it is larger than the sum of its proper divisors (58511808133).

121513374747 is an equidigital number, since it uses as much as digits as its factorization.

121513374747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134219 (or 134213 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

Adding to 121513374747 its reverse (747473315121), we get a palindrome (868986689868).

The spelling of 121513374747 in words is "one hundred twenty-one billion, five hundred thirteen million, three hundred seventy-four thousand, seven hundred forty-seven".