121031333257 has 2 divisors, whose sum is σ = 121031333258. Its totient is φ = 121031333256.

The previous prime is 121031333243. The next prime is 121031333431. The reversal of 121031333257 is 752333130121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72008502336 + 49022830921 = 268344^2 + 221411^2 .

It is an emirp because it is prime and its reverse (752333130121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121031333257 - 2²⁷ = 120897115529 is a prime.

It is not a weakly prime, because it can be changed into another prime (121031133257) 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 as a sum of consecutive naturals, namely, 60515666628 + 60515666629.

It is an arithmetic number, because the mean of its divisors is an integer number (60515666629).

Almost surely, 2^121031333257 is an apocalyptic number.

It is an amenable number.

121031333257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031333257 is an equidigital number, since it uses as much as digits as its factorization.

121031333257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

Adding to 121031333257 its reverse (752333130121), we get a palindrome (873364463378).

The spelling of 121031333257 in words is "one hundred twenty-one billion, thirty-one million, three hundred thirty-three thousand, two hundred fifty-seven".