13111220211312 has 80 divisors (see below), whose sum is σ = 35663846832000. Its totient is φ = 4139162641152.

The previous prime is 13111220211283. The next prime is 13111220211317. The reversal of 13111220211312 is 21311202211131.

It is a super-2 number, since 2×13111220211312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111220211317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969739 + ... + 5211797.

It is an arithmetic number, because the mean of its divisors is an integer number (445798085400).

Almost surely, 2^{13111220211312} is an apocalyptic number.

13111220211312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13111220211312 is an abundant number, since it is smaller than the sum of its proper divisors (22552626620688).

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

13111220211312 is a wasteful number, since it uses less digits than its factorization.

13111220211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245478 (or 4245472 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 13111220211312 its reverse (21311202211131), we get a palindrome (34422422422443).

The spelling of 13111220211312 in words is "thirteen trillion, one hundred eleven billion, two hundred twenty million, two hundred eleven thousand, three hundred twelve".