11512405224421 has 2 divisors, whose sum is σ = 11512405224422. Its totient is φ = 11512405224420.

The previous prime is 11512405224403. The next prime is 11512405224433. The reversal of 11512405224421 is 12442250421511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11288592022500 + 223813201921 = 3359850^2 + 473089^2 .

It is a cyclic number.

It is not a de Polignac number, because 11512405224421 - 2¹⁷ = 11512405093349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11512405224401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756202612210 + 5756202612211.

It is an arithmetic number, because the mean of its divisors is an integer number (5756202612211).

Almost surely, 2^{11512405224421} is an apocalyptic number.

It is an amenable number.

11512405224421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11512405224421 is an equidigital number, since it uses as much as digits as its factorization.

11512405224421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 34.

Adding to 11512405224421 its reverse (12442250421511), we get a palindrome (23954655645932).

The spelling of 11512405224421 in words is "eleven trillion, five hundred twelve billion, four hundred five million, two hundred twenty-four thousand, four hundred twenty-one".