213111321210 has 96 divisors (see below), whose sum is σ = 571713472512. Its totient is φ = 55047029760.

The previous prime is 213111321209. The next prime is 213111321217. The reversal of 213111321210 is 12123111312.

213111321210 is a `hidden beast` number, since 2 + 131 + 1 + 1 + 321 + 210 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (213111321217) 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, 150615 + ... + 670005.

It is an arithmetic number, because the mean of its divisors is an integer number (5955348672).

Almost surely, 2^213111321210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213111321210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285856736256).

213111321210 is an abundant number, since it is smaller than the sum of its proper divisors (358602151302).

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

213111321210 is a wasteful number, since it uses less digits than its factorization.

213111321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519548 (or 519545 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 213111321210 its reverse (12123111312), we get a palindrome (225234432522).

The spelling of 213111321210 in words is "two hundred thirteen billion, one hundred eleven million, three hundred twenty-one thousand, two hundred ten".