20101001001020 has 24 divisors (see below), whose sum is σ = 42213159849168. Its totient is φ = 8040198924800.

The previous prime is 20101001001019. The next prime is 20101001001079. The reversal of 20101001001020 is 2010010010102.

It is a junction number, because it is equal to n+sod(n) for n = 20101001000989 and 20101001001007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11772821 + ... + 13371660.

It is an arithmetic number, because the mean of its divisors is an integer number (1758881660382).

Almost surely, 2^{20101001001020} is an apocalyptic number.

20101001001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101001001020 is an abundant number, since it is smaller than the sum of its proper divisors (22112158848148).

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

20101001001020 is a wasteful number, since it uses less digits than its factorization.

20101001001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25184461 (or 25184459 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20101001001020 its reverse (2010010010102), we get a palindrome (22111011011122).

The spelling of 20101001001020 in words is "twenty trillion, one hundred one billion, one million, one thousand, twenty".