121049557 has 2 divisors, whose sum is σ = 121049558. Its totient is φ = 121049556.

The previous prime is 121049543. The next prime is 121049561. The reversal of 121049557 is 755940121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121022001 + 27556 = 11001^2 + 166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121049557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121043557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60524778 + 60524779.

It is an arithmetic number, because the mean of its divisors is an integer number (60524779).

Almost surely, 2^121049557 is an apocalyptic number.

It is an amenable number.

121049557 is a deficient number, since it is larger than the sum of its proper divisors (1).

121049557 is an equidigital number, since it uses as much as digits as its factorization.

121049557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 121049557 is about 11002.2523603124. The cubic root of 121049557 is about 494.6762594213.

Adding to 121049557 its reverse (755940121), we get a palindrome (876989678).

The spelling of 121049557 in words is "one hundred twenty-one million, forty-nine thousand, five hundred fifty-seven".