121113257 has 2 divisors, whose sum is σ = 121113258. Its totient is φ = 121113256.

The previous prime is 121113233. The next prime is 121113259. The reversal of 121113257 is 752311121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115261696 + 5851561 = 10736^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 121113257 - 2¹² = 121109161 is a prime.

It is a super-2 number, since 2×121113257² = 29336842042296098, which contains 22 as substring.

Together with 121113259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121113259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556628 + 60556629.

It is an arithmetic number, because the mean of its divisors is an integer number (60556629).

Almost surely, 2^121113257 is an apocalyptic number.

It is an amenable number.

121113257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121113257 is an equidigital number, since it uses as much as digits as its factorization.

121113257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 121113257 is about 11005.1468413647. The cubic root of 121113257 is about 494.7630154926.

Adding to 121113257 its reverse (752311121), we get a palindrome (873424378).

The spelling of 121113257 in words is "one hundred twenty-one million, one hundred thirteen thousand, two hundred fifty-seven".