202110002020 has 12 divisors (see below), whose sum is σ = 424431004284. Its totient is φ = 80844000800.

The previous prime is 202110002009. The next prime is 202110002021. The reversal of 202110002020 is 20200011202.

It can be written as a sum of positive squares in 2 ways, for example, as 110505715776 + 91604286244 = 332424^2 + 302662^2 .

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 = 202110001988 and 202110002006.

It is not an unprimeable number, because it can be changed into a prime (202110002021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5052750031 + ... + 5052750070.

It is an arithmetic number, because the mean of its divisors is an integer number (35369250357).

Almost surely, 2^202110002020 is an apocalyptic number.

202110002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202110002020 is an abundant number, since it is smaller than the sum of its proper divisors (222321002264).

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

202110002020 is a wasteful number, since it uses less digits than its factorization.

202110002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105500110 (or 10105500108 counting only the distinct ones).

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

Adding to 202110002020 its reverse (20200011202), we get a palindrome (222310013222).

The spelling of 202110002020 in words is "two hundred two billion, one hundred ten million, two thousand, twenty".