111102122100020 has 48 divisors (see below), whose sum is σ = 247063397909328. Its totient is φ = 41822522664960.

The previous prime is 111102122099999. The next prime is 111102122100023. The reversal of 111102122100020 is 20001221201111.

It can be written as a sum of positive squares in 8 ways, for example, as 280266477604 + 110821855622416 = 529402^2 + 10527196^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111102122099968 and 111102122100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102122100023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12818747 + ... + 19660226.

It is an arithmetic number, because the mean of its divisors is an integer number (5147154123111).

Almost surely, 2^{111102122100020} is an apocalyptic number.

111102122100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111102122100020 is an abundant number, since it is smaller than the sum of its proper divisors (135961275809308).

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

111102122100020 is a wasteful number, since it uses less digits than its factorization.

111102122100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32489060 (or 32489058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111102122100020 its reverse (20001221201111), we get a palindrome (131103343301131).

The spelling of 111102122100020 in words is "one hundred eleven trillion, one hundred two billion, one hundred twenty-two million, one hundred thousand, twenty".