13212143505 has 48 divisors (see below), whose sum is σ = 25240610304. Its totient is φ = 6339824640.

The previous prime is 13212143501. The next prime is 13212143507. The reversal of 13212143505 is 50534121231.

13212143505 is a `hidden beast` number, since 1 + 3 + 2 + 12 + 143 + 505 = 666.

It is not a de Polignac number, because 13212143505 - 2² = 13212143501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13212143501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89569 + ... + 185598.

It is an arithmetic number, because the mean of its divisors is an integer number (525846048).

Almost surely, 2^13212143505 is an apocalyptic number.

13212143505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13212143505 is a deficient number, since it is larger than the sum of its proper divisors (12028466799).

13212143505 is a wasteful number, since it uses less digits than its factorization.

13212143505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275286 (or 275283 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13212143505 its reverse (50534121231), we get a palindrome (63746264736).

The spelling of 13212143505 in words is "thirteen billion, two hundred twelve million, one hundred forty-three thousand, five hundred five".