111031020020 has 24 divisors (see below), whose sum is σ = 233175141024. Its totient is φ = 44410503456.

The previous prime is 111031019977. The next prime is 111031020029. The reversal of 111031020020 is 20020130111.

It is a super-3 number, since 3×111031020020³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111031019983 and 111031020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111031020029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418127 + ... + 629993.

It is an arithmetic number, because the mean of its divisors is an integer number (9715630876).

Almost surely, 2^111031020020 is an apocalyptic number.

111031020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111031020020 is an abundant number, since it is smaller than the sum of its proper divisors (122144121004).

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

111031020020 is a wasteful number, since it uses less digits than its factorization.

111031020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238079 (or 238077 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 111031020020 its reverse (20020130111), we get a palindrome (131051150131).

The spelling of 111031020020 in words is "one hundred eleven billion, thirty-one million, twenty thousand, twenty".