213202122020 has 24 divisors (see below), whose sum is σ = 448048717368. Its totient is φ = 85219084800.

The previous prime is 213202122011. The next prime is 213202122101. The reversal of 213202122020 is 20221202312.

It can be written as a sum of positive squares in 4 ways, for example, as 76586134564 + 136615987456 = 276742^2 + 369616^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213202122020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3831941 + ... + 3887180.

It is an arithmetic number, because the mean of its divisors is an integer number (18668696557).

Almost surely, 2^213202122020 is an apocalyptic number.

213202122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213202122020 is an abundant number, since it is smaller than the sum of its proper divisors (234846595348).

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

213202122020 is a wasteful number, since it uses less digits than its factorization.

213202122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7720511 (or 7720509 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 213202122020 its reverse (20221202312), we get a palindrome (233423324332).

The spelling of 213202122020 in words is "two hundred thirteen billion, two hundred two million, one hundred twenty-two thousand, twenty".