101111220020 has 24 divisors (see below), whose sum is σ = 212360849064. Its totient is φ = 40439290496.

The previous prime is 101111220013. The next prime is 101111220031. The reversal of 101111220020 is 20022111101.

It can be written as a sum of positive squares in 4 ways, for example, as 724901776 + 100386318244 = 26924^2 + 316838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 101111219983 and 101111220010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163367 + ... + 478446.

It is an arithmetic number, because the mean of its divisors is an integer number (8848368711).

Almost surely, 2^101111220020 is an apocalyptic number.

101111220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111220020 is an abundant number, since it is smaller than the sum of its proper divisors (111249629044).

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

101111220020 is a wasteful number, since it uses less digits than its factorization.

101111220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649699 (or 649697 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101111220020 its reverse (20022111101), we get a palindrome (121133331121).

The spelling of 101111220020 in words is "one hundred one billion, one hundred eleven million, two hundred twenty thousand, twenty".