121113751 has 4 divisors (see below), whose sum is σ = 132124104. Its totient is φ = 110103400.

The previous prime is 121113737. The next prime is 121113761. The reversal of 121113751 is 157311121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121113751 - 2⁷ = 121113623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121113721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5505160 + ... + 5505181.

It is an arithmetic number, because the mean of its divisors is an integer number (33031026).

Almost surely, 2^121113751 is an apocalyptic number.

121113751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121113751 is a deficient number, since it is larger than the sum of its proper divisors (11010353).

121113751 is a wasteful number, since it uses less digits than its factorization.

121113751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010352.

The product of its digits is 210, while the sum is 22.

The square root of 121113751 is about 11005.1692853858. The cubic root of 121113751 is about 494.7636881759.

Adding to 121113751 its reverse (157311121), we get a palindrome (278424872).

The spelling of 121113751 in words is "one hundred twenty-one million, one hundred thirteen thousand, seven hundred fifty-one".