213121103230 has 96 divisors (see below), whose sum is σ = 469944115200. Its totient is φ = 69193680192.

The previous prime is 213121103213. The next prime is 213121103231. The reversal of 213121103230 is 32301121312.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 213121103198 and 213121103207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121103231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31715811 + ... + 31722529.

It is an arithmetic number, because the mean of its divisors is an integer number (4895251200).

Almost surely, 2^213121103230 is an apocalyptic number.

213121103230 is an abundant number, since it is smaller than the sum of its proper divisors (256823011970).

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

213121103230 is a wasteful number, since it uses less digits than its factorization.

213121103230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10166 (or 10159 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 213121103230 its reverse (32301121312), we get a palindrome (245422224542).

The spelling of 213121103230 in words is "two hundred thirteen billion, one hundred twenty-one million, one hundred three thousand, two hundred thirty".