10102021000020 has 36 divisors (see below), whose sum is σ = 30642797033940. Its totient is φ = 2693872266624.

The previous prime is 10102021000003. The next prime is 10102021000039. The reversal of 10102021000020 is 2000012020101.

It can be written as a sum of positive squares in 2 ways, for example, as 1897302385476 + 8204718614544 = 1377426^2 + 2864388^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 10102020999966 and 10102021000011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28061169265 + ... + 28061169624.

Almost surely, 2^{10102021000020} is an apocalyptic number.

10102021000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10102021000020 is an abundant number, since it is smaller than the sum of its proper divisors (20540776033920).

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

10102021000020 is a wasteful number, since it uses less digits than its factorization.

10102021000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56122338904 (or 56122338899 counting only the distinct ones).

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

Adding to 10102021000020 its reverse (2000012020101), we get a palindrome (12102033020121).

The spelling of 10102021000020 in words is "ten trillion, one hundred two billion, twenty-one million, twenty", and thus it is an aban number.