13111212031020 has 36 divisors (see below), whose sum is σ = 39770676494640. Its totient is φ = 3496323208224.

The previous prime is 13111212031019. The next prime is 13111212031031. The reversal of 13111212031020 is 2013021211131.

13111212031020 is a `hidden beast` number, since 1 + 311 + 1 + 2 + 1 + 20 + 310 + 20 = 666.

13111212031020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13111212030984 and 13111212031002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36420033240 + ... + 36420033599.

It is an arithmetic number, because the mean of its divisors is an integer number (1104741013740).

Almost surely, 2^{13111212031020} is an apocalyptic number.

13111212031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111212031020 is an abundant number, since it is smaller than the sum of its proper divisors (26659464463620).

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

13111212031020 is a wasteful number, since it uses less digits than its factorization.

13111212031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72840066854 (or 72840066849 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 13111212031020 its reverse (2013021211131), we get a palindrome (15124233242151).

The spelling of 13111212031020 in words is "thirteen trillion, one hundred eleven billion, two hundred twelve million, thirty-one thousand, twenty".