213223201020 has 72 divisors (see below), whose sum is σ = 646855058304. Its totient is φ = 56852661888.

The previous prime is 213223201001. The next prime is 213223201027. The reversal of 213223201020 is 20102322312.

213223201020 is a `hidden beast` number, since 2 + 1 + 322 + 320 + 1 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213223200984 and 213223201002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213223201027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1523637 + ... + 1657683.

It is an arithmetic number, because the mean of its divisors is an integer number (8984098032).

Almost surely, 2^213223201020 is an apocalyptic number.

213223201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213223201020 is an abundant number, since it is smaller than the sum of its proper divisors (433631857284).

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

213223201020 is a wasteful number, since it uses less digits than its factorization.

213223201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142899 (or 142894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 213223201020 its reverse (20102322312), we get a palindrome (233325523332).

The spelling of 213223201020 in words is "two hundred thirteen billion, two hundred twenty-three million, two hundred one thousand, twenty".