2102011020020 has 24 divisors (see below), whose sum is σ = 4673883327624. Its totient is φ = 791345325056.

The previous prime is 2102011019959. The next prime is 2102011020029. The reversal of 2102011020020 is 200201102012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1018238410084 + 1083772609936 = 1009078^2 + 1041044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2102011019983 and 2102011020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102011020029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3091192337 + ... + 3091193016.

It is an arithmetic number, because the mean of its divisors is an integer number (194745138651).

Almost surely, 2^{2102011020020} is an apocalyptic number.

2102011020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102011020020 is an abundant number, since it is smaller than the sum of its proper divisors (2571872307604).

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

2102011020020 is a wasteful number, since it uses less digits than its factorization.

2102011020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182385379 (or 6182385377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2102011020020 its reverse (200201102012), we get a palindrome (2302212122032).

The spelling of 2102011020020 in words is "two trillion, one hundred two billion, eleven million, twenty thousand, twenty".