111213122020 has 192 divisors, whose sum is σ = 316684795392. Its totient is φ = 31680000000.

The previous prime is 111213122003. The next prime is 111213122023. The reversal of 111213122020 is 20221312111.

It is a junction number, because it is equal to n+sod(n) for n = 111213121985 and 111213122003.

It is not an unprimeable number, because it can be changed into a prime (111213122023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1994520 + ... + 2049520.

It is an arithmetic number, because the mean of its divisors is an integer number (1649399976).

Almost surely, 2^111213122020 is an apocalyptic number.

111213122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111213122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158342397696).

111213122020 is an abundant number, since it is smaller than the sum of its proper divisors (205471673372).

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

111213122020 is a wasteful number, since it uses less digits than its factorization.

111213122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55142 (or 55140 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111213122020 its reverse (20221312111), we get a palindrome (131434434131).

The spelling of 111213122020 in words is "one hundred eleven billion, two hundred thirteen million, one hundred twenty-two thousand, twenty".