111022021020 has 48 divisors (see below), whose sum is σ = 317475744768. Its totient is φ = 28975959360.

The previous prime is 111022021009. The next prime is 111022021069. The reversal of 111022021020 is 20120220111.

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 = 111022020987 and 111022021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19681936 + ... + 19687575.

It is an arithmetic number, because the mean of its divisors is an integer number (6614078016).

Almost surely, 2^111022021020 is an apocalyptic number.

111022021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111022021020 is an abundant number, since it is smaller than the sum of its proper divisors (206453723748).

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

111022021020 is a wasteful number, since it uses less digits than its factorization.

111022021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39369570 (or 39369568 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111022021020 its reverse (20120220111), we get a palindrome (131142241131).

The spelling of 111022021020 in words is "one hundred eleven billion, twenty-two million, twenty-one thousand, twenty".