121752122 has 4 divisors (see below), whose sum is σ = 182628186. Its totient is φ = 60876060.

The previous prime is 121752109. The next prime is 121752139. The reversal of 121752122 is 221257121.

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

It can be written as a sum of positive squares in only one way, i.e., 104019601 + 17732521 = 10199^2 + 4211^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30438029 + ... + 30438032.

Almost surely, 2^121752122 is an apocalyptic number.

121752122 is a deficient number, since it is larger than the sum of its proper divisors (60876064).

121752122 is an equidigital number, since it uses as much as digits as its factorization.

121752122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60876063.

The product of its digits is 560, while the sum is 23.

The square root of 121752122 is about 11034.1344019366. The cubic root of 121752122 is about 495.6314385023.

The spelling of 121752122 in words is "one hundred twenty-one million, seven hundred fifty-two thousand, one hundred twenty-two".