11512413016421 has 2 divisors, whose sum is σ = 11512413016422. Its totient is φ = 11512413016420.

The previous prime is 11512413016331. The next prime is 11512413016471. The reversal of 11512413016421 is 12461031421511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7979099572900 + 3533313443521 = 2824730^2 + 1879711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11512413016421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11512413016471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756206508210 + 5756206508211.

It is an arithmetic number, because the mean of its divisors is an integer number (5756206508211).

Almost surely, 2^{11512413016421} is an apocalyptic number.

It is an amenable number.

11512413016421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512413016421 is an equidigital number, since it uses as much as digits as its factorization.

11512413016421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 11512413016421 its reverse (12461031421511), we get a palindrome (23973444437932).

The spelling of 11512413016421 in words is "eleven trillion, five hundred twelve billion, four hundred thirteen million, sixteen thousand, four hundred twenty-one".