15012132521 has 2 divisors, whose sum is σ = 15012132522. Its totient is φ = 15012132520.

The previous prime is 15012132517. The next prime is 15012132593. The reversal of 15012132521 is 12523121051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12614659225 + 2397473296 = 112315^2 + 48964^2 .

It is a cyclic number.

It is not a de Polignac number, because 15012132521 - 2² = 15012132517 is a prime.

It is not a weakly prime, because it can be changed into another prime (15012432521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7506066260 + 7506066261.

It is an arithmetic number, because the mean of its divisors is an integer number (7506066261).

Almost surely, 2^15012132521 is an apocalyptic number.

It is an amenable number.

15012132521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15012132521 is an equidigital number, since it uses as much as digits as its factorization.

15012132521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 15012132521 its reverse (12523121051), we get a palindrome (27535253572).

The spelling of 15012132521 in words is "fifteen billion, twelve million, one hundred thirty-two thousand, five hundred twenty-one".