111211110010020 has 48 divisors (see below), whose sum is σ = 311392925944128. Its totient is φ = 29656122867840.

The previous prime is 111211110010019. The next prime is 111211110010031. The reversal of 111211110010020 is 20010011112111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111211110009978 and 111211110010005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5122042 + ... + 15768878.

It is an arithmetic number, because the mean of its divisors is an integer number (6487352623836).

Almost surely, 2^{111211110010020} is an apocalyptic number.

111211110010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211110010020 is an abundant number, since it is smaller than the sum of its proper divisors (200181815934108).

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

111211110010020 is a wasteful number, since it uses less digits than its factorization.

111211110010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10820940 (or 10820938 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111211110010020 its reverse (20010011112111), we get a palindrome (131221121122131).

The spelling of 111211110010020 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred ten million, ten thousand, twenty".