210202021020 has 48 divisors (see below), whose sum is σ = 596628214560. Its totient is φ = 55286009856.

The previous prime is 210202020961. The next prime is 210202021027. The reversal of 210202021020 is 20120202012.

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 = 210202020987 and 210202021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202021027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23991285 + ... + 24000044.

It is an arithmetic number, because the mean of its divisors is an integer number (12429754470).

Almost surely, 2^210202021020 is an apocalyptic number.

210202021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210202021020 is an abundant number, since it is smaller than the sum of its proper divisors (386426193540).

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

210202021020 is a wasteful number, since it uses less digits than its factorization.

210202021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47991414 (or 47991412 counting only the distinct ones).

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

Adding to 210202021020 its reverse (20120202012), we get a palindrome (230322223032).

The spelling of 210202021020 in words is "two hundred ten billion, two hundred two million, twenty-one thousand, twenty".