101111201020 has 24 divisors (see below), whose sum is σ = 213506643168. Its totient is φ = 40221028800.

The previous prime is 101111200991. The next prime is 101111201029. The reversal of 101111201020 is 20102111101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 101111200988 and 101111201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111201029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13962016 + ... + 13969255.

It is an arithmetic number, because the mean of its divisors is an integer number (8896110132).

Almost surely, 2^101111201020 is an apocalyptic number.

101111201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111201020 is an abundant number, since it is smaller than the sum of its proper divisors (112395442148).

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

101111201020 is a wasteful number, since it uses less digits than its factorization.

101111201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27931461 (or 27931459 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101111201020 its reverse (20102111101), we get a palindrome (121213312121).

The spelling of 101111201020 in words is "one hundred one billion, one hundred eleven million, two hundred one thousand, twenty".