2102010020020 has 24 divisors (see below), whose sum is σ = 4414880064168. Its totient is φ = 840678480000.

The previous prime is 2102010019999. The next prime is 2102010020039. The reversal of 2102010020020 is 200200102012.

It can be written as a sum of positive squares in 4 ways, for example, as 276284794384 + 1825725225636 = 525628^2 + 1351194^2 .

It is a super-2 number, since 2×2102010020020² (a number of 25 digits) contains 22 as substring.

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 = 2102010019979 and 2102010020006.

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, 7708131 + ... + 7976170.

It is an arithmetic number, because the mean of its divisors is an integer number (183953336007).

Almost surely, 2^{2102010020020} is an apocalyptic number.

2102010020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102010020020 is an abundant number, since it is smaller than the sum of its proper divisors (2312870044148).

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

2102010020020 is a wasteful number, since it uses less digits than its factorization.

2102010020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15691011 (or 15691009 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2102010020020 its reverse (200200102012), we get a palindrome (2302210122032).

The spelling of 2102010020020 in words is "two trillion, one hundred two billion, ten million, twenty thousand, twenty".