13121221232212 has 12 divisors (see below), whose sum is σ = 22962332506176. Its totient is φ = 6560554801880.

The previous prime is 13121221232201. The next prime is 13121221232243. The reversal of 13121221232212 is 21223212212131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13422364 + ... + 14366707.

It is an arithmetic number, because the mean of its divisors is an integer number (1913527708848).

Almost surely, 2^{13121221232212} is an apocalyptic number.

It is an amenable number.

13121221232212 is a deficient number, since it is larger than the sum of its proper divisors (9841111273964).

13121221232212 is a wasteful number, since it uses less digits than its factorization.

13121221232212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27907118 (or 27907116 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

Adding to 13121221232212 its reverse (21223212212131), we get a palindrome (34344433444343).

The spelling of 13121221232212 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-two thousand, two hundred twelve".