213231230020 has 12 divisors (see below), whose sum is σ = 447785583084. Its totient is φ = 85292492000.

The previous prime is 213231230011. The next prime is 213231230021. The reversal of 213231230020 is 20032132312.

It can be written as a sum of positive squares in 2 ways, for example, as 163641284676 + 49589945344 = 404526^2 + 222688^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213231230020.

It is not an unprimeable number, because it can be changed into a prime (213231230021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330780731 + ... + 5330780770.

It is an arithmetic number, because the mean of its divisors is an integer number (37315465257).

Almost surely, 2^213231230020 is an apocalyptic number.

213231230020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213231230020 is an abundant number, since it is smaller than the sum of its proper divisors (234554353064).

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

213231230020 is a wasteful number, since it uses less digits than its factorization.

213231230020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661561510 (or 10661561508 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 213231230020 its reverse (20032132312), we get a palindrome (233263362332).

The spelling of 213231230020 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred thirty thousand, twenty".