13215423515212 has 48 divisors (see below), whose sum is σ = 24522792723072. Its totient is φ = 6210041160960.

The previous prime is 13215423515209. The next prime is 13215423515243. The reversal of 13215423515212 is 21251532451231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137150883 + ... + 137247205.

It is an arithmetic number, because the mean of its divisors is an integer number (510891515064).

Almost surely, 2^{13215423515212} is an apocalyptic number.

It is an amenable number.

13215423515212 is a deficient number, since it is larger than the sum of its proper divisors (11307369207860).

13215423515212 is a wasteful number, since it uses less digits than its factorization.

13215423515212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99238 (or 99236 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

Adding to 13215423515212 its reverse (21251532451231), we get a palindrome (34466955966443).

The spelling of 13215423515212 in words is "thirteen trillion, two hundred fifteen billion, four hundred twenty-three million, five hundred fifteen thousand, two hundred twelve".