111202111020 has 768 divisors, whose sum is σ = 433397809152. Its totient is φ = 20558499840.

The previous prime is 111202111019. The next prime is 111202111073. The reversal of 111202111020 is 20111202111.

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 = 111202110987 and 111202111005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 362221707 + ... + 362222013.

It is an arithmetic number, because the mean of its divisors is an integer number (564320064).

Almost surely, 2^111202111020 is an apocalyptic number.

111202111020 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 111202111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216698904576).

111202111020 is an abundant number, since it is smaller than the sum of its proper divisors (322195698132).

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

111202111020 is a wasteful number, since it uses less digits than its factorization.

111202111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111202111020 its reverse (20111202111), we get a palindrome (131313313131).

It can be divided in two parts, 111202 and 111020, that added together give a palindrome (222222).

The spelling of 111202111020 in words is "one hundred eleven billion, two hundred two million, one hundred eleven thousand, twenty".