111210102020 has 12 divisors (see below), whose sum is σ = 233541214284. Its totient is φ = 44484040800.

The previous prime is 111210101971. The next prime is 111210102041. The reversal of 111210102020 is 20201012111.

It can be written as a sum of positive squares in 2 ways, for example, as 74890890244 + 36319211776 = 273662^2 + 190576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111210101992 and 111210102010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780252531 + ... + 2780252570.

It is an arithmetic number, because the mean of its divisors is an integer number (19461767857).

Almost surely, 2^111210102020 is an apocalyptic number.

111210102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111210102020 is an abundant number, since it is smaller than the sum of its proper divisors (122331112264).

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

111210102020 is a wasteful number, since it uses less digits than its factorization.

111210102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560505110 (or 5560505108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111210102020 its reverse (20201012111), we get a palindrome (131411114131).

The spelling of 111210102020 in words is "one hundred eleven billion, two hundred ten million, one hundred two thousand, twenty".