213123320220 has 48 divisors (see below), whose sum is σ = 596916432000. Its totient is φ = 56816586816.

The previous prime is 213123320197. The next prime is 213123320227. The reversal of 213123320220 is 22023321312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123320227) 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, 297642 + ... + 717521.

It is an arithmetic number, because the mean of its divisors is an integer number (12435759000).

Almost surely, 2^213123320220 is an apocalyptic number.

213123320220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213123320220 is an abundant number, since it is smaller than the sum of its proper divisors (383793111780).

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

213123320220 is a wasteful number, since it uses less digits than its factorization.

213123320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018674 (or 1018672 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213123320220 its reverse (22023321312), we get a palindrome (235146641532).

The spelling of 213123320220 in words is "two hundred thirteen billion, one hundred twenty-three million, three hundred twenty thousand, two hundred twenty".