121103513 has 2 divisors, whose sum is σ = 121103514. Its totient is φ = 121103512.

The previous prime is 121103503. The next prime is 121103539. The reversal of 121103513 is 315301121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64432729 + 56670784 = 8027^2 + 7528^2 .

It is a cyclic number.

It is not a de Polignac number, because 121103513 - 2¹⁰ = 121102489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121103491 and 121103500.

It is not a weakly prime, because it can be changed into another prime (121103503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551756 + 60551757.

It is an arithmetic number, because the mean of its divisors is an integer number (60551757).

Almost surely, 2^121103513 is an apocalyptic number.

It is an amenable number.

121103513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121103513 is an equidigital number, since it uses as much as digits as its factorization.

121103513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 121103513 is about 11004.7041305071. The cubic root of 121103513 is about 494.7497466448.

Adding to 121103513 its reverse (315301121), we get a palindrome (436404634).

The spelling of 121103513 in words is "one hundred twenty-one million, one hundred three thousand, five hundred thirteen".