101021201020 has 96 divisors (see below), whose sum is σ = 222143201280. Its totient is φ = 38543281920.

The previous prime is 101021201003. The next prime is 101021201027. The reversal of 101021201020 is 20102120101.

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 = 101021200988 and 101021201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021201027) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 35607042 + ... + 35609878.

It is an arithmetic number, because the mean of its divisors is an integer number (2313991680).

Almost surely, 2^101021201020 is an apocalyptic number.

101021201020 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 101021201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111071600640).

101021201020 is an abundant number, since it is smaller than the sum of its proper divisors (121122000260).

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

101021201020 is a wasteful number, since it uses less digits than its factorization.

101021201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683 (or 3681 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 101021201020 its reverse (20102120101), we get a palindrome (121123321121).

The spelling of 101021201020 in words is "one hundred one billion, twenty-one million, two hundred one thousand, twenty".