121706751 has 4 divisors (see below), whose sum is σ = 162275672. Its totient is φ = 81137832.

The previous prime is 121706749. The next prime is 121706759. The reversal of 121706751 is 157607121.

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

It is not a de Polignac number, because 121706751 - 2¹ = 121706749 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 (121706759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20284456 + ... + 20284461.

It is an arithmetic number, because the mean of its divisors is an integer number (40568918).

Almost surely, 2^121706751 is an apocalyptic number.

121706751 is a deficient number, since it is larger than the sum of its proper divisors (40568921).

121706751 is an equidigital number, since it uses as much as digits as its factorization.

121706751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40568920.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 121706751 is about 11032.0782720211. The cubic root of 121706751 is about 495.5698650707.

The spelling of 121706751 in words is "one hundred twenty-one million, seven hundred six thousand, seven hundred fifty-one".