121142503 has 2 divisors, whose sum is σ = 121142504. Its totient is φ = 121142502.

The previous prime is 121142467. The next prime is 121142519. The reversal of 121142503 is 305241121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121142503 is a prime.

It is a super-3 number, since 3×121142503³ (a number of 25 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121142563) 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, 60571251 + 60571252.

It is an arithmetic number, because the mean of its divisors is an integer number (60571252).

Almost surely, 2^121142503 is an apocalyptic number.

121142503 is a deficient number, since it is larger than the sum of its proper divisors (1).

121142503 is an equidigital number, since it uses as much as digits as its factorization.

121142503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121142503 is about 11006.4755030845. The cubic root of 121142503 is about 494.8028368272.

Adding to 121142503 its reverse (305241121), we get a palindrome (426383624).

The spelling of 121142503 in words is "one hundred twenty-one million, one hundred forty-two thousand, five hundred three".