121003257 has 8 divisors (see below), whose sum is σ = 161388576. Its totient is φ = 80643392.

The previous prime is 121003249. The next prime is 121003271. The reversal of 121003257 is 752300121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121003257 - 2³ = 121003249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121002257) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14593 + ... + 21329.

It is an arithmetic number, because the mean of its divisors is an integer number (20173572).

Almost surely, 2^121003257 is an apocalyptic number.

It is an amenable number.

121003257 is a deficient number, since it is larger than the sum of its proper divisors (40385319).

121003257 is an equidigital number, since it uses as much as digits as its factorization.

121003257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12727.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 121003257 is about 11000.1480444583. The cubic root of 121003257 is about 494.6131821382.

Adding to 121003257 its reverse (752300121), we get a palindrome (873303378).

The spelling of 121003257 in words is "one hundred twenty-one million, three thousand, two hundred fifty-seven".