121100203823513 has 2 divisors, whose sum is σ = 121100203823514. Its totient is φ = 121100203823512.

The previous prime is 121100203823491. The next prime is 121100203823519. The reversal of 121100203823513 is 315328302001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75942301102144 + 45157902721369 = 8714488^2 + 6719963^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100203823513 - 2¹⁴ = 121100203807129 is a prime.

It is a super-2 number, since 2×121100203823513² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121100203823513.

It is not a weakly prime, because it can be changed into another prime (121100203823519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550101911756 + 60550101911757.

It is an arithmetic number, because the mean of its divisors is an integer number (60550101911757).

Almost surely, 2^{121100203823513} is an apocalyptic number.

It is an amenable number.

121100203823513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100203823513 is an equidigital number, since it uses as much as digits as its factorization.

121100203823513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 121100203823513 its reverse (315328302001121), we get a palindrome (436428505824634).

The spelling of 121100203823513 in words is "one hundred twenty-one trillion, one hundred billion, two hundred three million, eight hundred twenty-three thousand, five hundred thirteen".