15244512111421 has 2 divisors, whose sum is σ = 15244512111422. Its totient is φ = 15244512111420.

The previous prime is 15244512111397. The next prime is 15244512111443. The reversal of 15244512111421 is 12411121544251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10202178987225 + 5042333124196 = 3194085^2 + 2245514^2 .

It is an emirp because it is prime and its reverse (12411121544251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15244512111421 - 2¹¹ = 15244512109373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15244512111481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7622256055710 + 7622256055711.

It is an arithmetic number, because the mean of its divisors is an integer number (7622256055711).

Almost surely, 2^{15244512111421} is an apocalyptic number.

It is an amenable number.

15244512111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15244512111421 is an equidigital number, since it uses as much as digits as its factorization.

15244512111421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12800, while the sum is 34.

Adding to 15244512111421 its reverse (12411121544251), we get a palindrome (27655633655672).

The spelling of 15244512111421 in words is "fifteen trillion, two hundred forty-four billion, five hundred twelve million, one hundred eleven thousand, four hundred twenty-one".