12215131206535 has 8 divisors (see below), whose sum is σ = 15163611153120. Its totient is φ = 9435135828384.

The previous prime is 12215131206533. The next prime is 12215131206539. The reversal of 12215131206535 is 53560213151221.

12215131206535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12215131206535 - 2¹ = 12215131206533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12215131206494 and 12215131206503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215131206533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42121141947 + ... + 42121142236.

It is an arithmetic number, because the mean of its divisors is an integer number (1895451394140).

Almost surely, 2^{12215131206535} is an apocalyptic number.

12215131206535 is a deficient number, since it is larger than the sum of its proper divisors (2948479946585).

12215131206535 is an equidigital number, since it uses as much as digits as its factorization.

12215131206535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84242284217.

The product of its (nonzero) digits is 54000, while the sum is 37.

Adding to 12215131206535 its reverse (53560213151221), we get a palindrome (65775344357756).

The spelling of 12215131206535 in words is "twelve trillion, two hundred fifteen billion, one hundred thirty-one million, two hundred six thousand, five hundred thirty-five".