121330857 has 4 divisors (see below), whose sum is σ = 161774480. Its totient is φ = 80887236.

The previous prime is 121330837. The next prime is 121330861. The reversal of 121330857 is 758033121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121330857 - 2⁶ = 121330793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121330837) 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, 20221807 + ... + 20221812.

It is an arithmetic number, because the mean of its divisors is an integer number (40443620).

Almost surely, 2^121330857 is an apocalyptic number.

It is an amenable number.

121330857 is a deficient number, since it is larger than the sum of its proper divisors (40443623).

121330857 is an equidigital number, since it uses as much as digits as its factorization.

121330857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40443622.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 121330857 is about 11015.0286881152. The cubic root of 121330857 is about 495.0591460802.

Adding to 121330857 its reverse (758033121), we get a palindrome (879363978).

The spelling of 121330857 in words is "one hundred twenty-one million, three hundred thirty thousand, eight hundred fifty-seven".