111210111020 has 12 divisors (see below), whose sum is σ = 233541233184. Its totient is φ = 44484044400.

The previous prime is 111210111013. The next prime is 111210111071. The reversal of 111210111020 is 20111012111.

It is a junction number, because it is equal to n+sod(n) for n = 111210110992 and 111210111010.

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, 2780252756 + ... + 2780252795.

It is an arithmetic number, because the mean of its divisors is an integer number (19461769432).

Almost surely, 2^111210111020 is an apocalyptic number.

111210111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111210111020 is an abundant number, since it is smaller than the sum of its proper divisors (122331122164).

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

111210111020 is a wasteful number, since it uses less digits than its factorization.

111210111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560505560 (or 5560505558 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111210111020 its reverse (20111012111), we get a palindrome (131321123131).

The spelling of 111210111020 in words is "one hundred eleven billion, two hundred ten million, one hundred eleven thousand, twenty".