13111231212120 has 64 divisors (see below), whose sum is σ = 39341548044000. Its totient is φ = 3495630153728.

The previous prime is 13111231212119. The next prime is 13111231212139. The reversal of 13111231212120 is 2121213211131.

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 15 ways as a sum of consecutive naturals, for example, 10305315 + ... + 11507474.

Almost surely, 2^{13111231212120} is an apocalyptic number.

13111231212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111231212120 is an abundant number, since it is smaller than the sum of its proper divisors (26230316831880).

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

13111231212120 is a wasteful number, since it uses less digits than its factorization.

13111231212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21817812 (or 21817808 counting only the distinct ones).

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

Adding to 13111231212120 its reverse (2121213211131), we get a palindrome (15232444423251).

The spelling of 13111231212120 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-one million, two hundred twelve thousand, one hundred twenty".