111212012010020 has 24 divisors (see below), whose sum is σ = 233716823533368. Its totient is φ = 44452119411200.

The previous prime is 111212012010013. The next prime is 111212012010041. The reversal of 111212012010020 is 20010210212111.

It can be written as a sum of positive squares in 4 ways, for example, as 12012643037476 + 99199368972544 = 3465926^2 + 9959888^2 .

It is a super-2 number, since 2×111212012010020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111212012009977 and 111212012010004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2042809151 + ... + 2042863590.

It is an arithmetic number, because the mean of its divisors is an integer number (9738200980557).

Almost surely, 2^{111212012010020} is an apocalyptic number.

111212012010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212012010020 is an abundant number, since it is smaller than the sum of its proper divisors (122504811523348).

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

111212012010020 is a wasteful number, since it uses less digits than its factorization.

111212012010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085674111 (or 4085674109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111212012010020 its reverse (20010210212111), we get a palindrome (131222222222131).

The spelling of 111212012010020 in words is "one hundred eleven trillion, two hundred twelve billion, twelve million, ten thousand, twenty".