13212124040 has 32 divisors (see below), whose sum is σ = 29764649880. Its totient is φ = 5278205952.

The previous prime is 13212124033. The next prime is 13212124063. The reversal of 13212124040 is 4042121231.

It can be written as a sum of positive squares in 4 ways, for example, as 9382247044 + 3829876996 = 96862^2 + 61886^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175337 + ... + 239096.

Almost surely, 2^13212124040 is an apocalyptic number.

13212124040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212124040 is an abundant number, since it is smaller than the sum of its proper divisors (16552525840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13212124040 is a wasteful number, since it uses less digits than its factorization.

13212124040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415241 (or 415237 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 13212124040 its reverse (4042121231), we get a palindrome (17254245271).

The spelling of 13212124040 in words is "thirteen billion, two hundred twelve million, one hundred twenty-four thousand, forty".