121023257 has 2 divisors, whose sum is σ = 121023258. Its totient is φ = 121023256.

The previous prime is 121023209. The next prime is 121023271. The reversal of 121023257 is 752320121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 440896 = 10981^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 121023257 - 2¹² = 121019161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121023277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511628 + 60511629.

It is an arithmetic number, because the mean of its divisors is an integer number (60511629).

Almost surely, 2^121023257 is an apocalyptic number.

It is an amenable number.

121023257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121023257 is an equidigital number, since it uses as much as digits as its factorization.

121023257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 121023257 is about 11001.0570855714. The cubic root of 121023257 is about 494.6404313184.

Adding to 121023257 its reverse (752320121), we get a palindrome (873343378).

The spelling of 121023257 in words is "one hundred twenty-one million, twenty-three thousand, two hundred fifty-seven".