210120202020 has 48 divisors (see below), whose sum is σ = 588599944128. Its totient is φ = 56006970240.

The previous prime is 210120202013. The next prime is 210120202051. The reversal of 210120202020 is 20202021012.

It is a super-2 number, since 2×210120202020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210120201987 and 210120202005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 648526 + ... + 916965.

It is an arithmetic number, because the mean of its divisors is an integer number (12262498836).

Almost surely, 2^210120202020 is an apocalyptic number.

210120202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210120202020 is an abundant number, since it is smaller than the sum of its proper divisors (378479742108).

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

210120202020 is a wasteful number, since it uses less digits than its factorization.

210120202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567740 (or 1567738 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 210120202020 its reverse (20202021012), we get a palindrome (230322223032).

The spelling of 210120202020 in words is "two hundred ten billion, one hundred twenty million, two hundred two thousand, twenty".