210202021220 has 12 divisors (see below), whose sum is σ = 441424244604. Its totient is φ = 84080808480.

The previous prime is 210202021193. The next prime is 210202021261. The reversal of 210202021220 is 22120202012.

It can be written as a sum of positive squares in 2 ways, for example, as 25461946624 + 184740074596 = 159568^2 + 429814^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210202021195 and 210202021204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5255050511 + ... + 5255050550.

It is an arithmetic number, because the mean of its divisors is an integer number (36785353717).

Almost surely, 2^210202021220 is an apocalyptic number.

210202021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210202021220 is an abundant number, since it is smaller than the sum of its proper divisors (231222223384).

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

210202021220 is a wasteful number, since it uses less digits than its factorization.

210202021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510101070 (or 10510101068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 210202021220 its reverse (22120202012), we get a palindrome (232322223232).

The spelling of 210202021220 in words is "two hundred ten billion, two hundred two million, twenty-one thousand, two hundred twenty".