121513775 has 12 divisors (see below), whose sum is σ = 151134672. Its totient is φ = 96915840.

The previous prime is 121513751. The next prime is 121513783. The reversal of 121513775 is 577315121.

It is not a de Polignac number, because 121513775 - 2⁸ = 121513519 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1214 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (12594556).

Almost surely, 2^121513775 is an apocalyptic number.

121513775 is a deficient number, since it is larger than the sum of its proper divisors (29620897).

121513775 is a wasteful number, since it uses less digits than its factorization.

121513775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14770 (or 14765 counting only the distinct ones).

The product of its digits is 7350, while the sum is 32.

The square root of 121513775 is about 11023.3286715039. The cubic root of 121513775 is about 495.3078043420.

Adding to 121513775 its reverse (577315121), we get a palindrome (698828896).

The spelling of 121513775 in words is "one hundred twenty-one million, five hundred thirteen thousand, seven hundred seventy-five".