213321312100 has 144 divisors (see below), whose sum is σ = 505973115648. Its totient is φ = 77594549760.

The previous prime is 213321312091. The next prime is 213321312131. The reversal of 213321312100 is 1213123312.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26374257 + ... + 26382343.

It is an arithmetic number, because the mean of its divisors is an integer number (3513702192).

Almost surely, 2^213321312100 is an apocalyptic number.

213321312100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213321312100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252986557824).

213321312100 is an abundant number, since it is smaller than the sum of its proper divisors (292651803548).

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

213321312100 is a wasteful number, since it uses less digits than its factorization.

213321312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8414 (or 8407 counting only the distinct ones).

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

Adding to 213321312100 its reverse (1213123312), we get a palindrome (214534435412).

The spelling of 213321312100 in words is "two hundred thirteen billion, three hundred twenty-one million, three hundred twelve thousand, one hundred".