10101202020 has 432 divisors, whose sum is σ = 39438545328. Its totient is φ = 2072770560.

The previous prime is 10101201997. The next prime is 10101202039. The reversal of 10101202020 is 2020210101.

It can be written as a sum of positive squares in 8 ways, for example, as 1656327204 + 8444874816 = 40698^2 + 91896^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10101201993 and 10101202011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4241230 + ... + 4243610.

It is an arithmetic number, because the mean of its divisors is an integer number (91292929).

Almost surely, 2^10101202020 is an apocalyptic number.

10101202020 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 10101202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19719272664).

10101202020 is an abundant number, since it is smaller than the sum of its proper divisors (29337343308).

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

10101202020 is a wasteful number, since it uses less digits than its factorization.

10101202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460 (or 2448 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10101202020 its reverse (2020210101), we get a palindrome (12121412121).

The spelling of 10101202020 in words is "ten billion, one hundred one million, two hundred two thousand, twenty".