121557103 has 2 divisors, whose sum is σ = 121557104. Its totient is φ = 121557102.

The previous prime is 121557097. The next prime is 121557119. The reversal of 121557103 is 301755121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121557103 is a prime.

It is a super-2 number, since 2×121557103² = 29552258579505218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121557133) 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, 60778551 + 60778552.

It is an arithmetic number, because the mean of its divisors is an integer number (60778552).

Almost surely, 2^121557103 is an apocalyptic number.

121557103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121557103 is an equidigital number, since it uses as much as digits as its factorization.

121557103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 121557103 is about 11025.2937829339. The cubic root of 121557103 is about 495.3666677543.

The spelling of 121557103 in words is "one hundred twenty-one million, five hundred fifty-seven thousand, one hundred three".