213131210231000 has 128 divisors (see below), whose sum is σ = 501889003200000. Its totient is φ = 84712189564800.

The previous prime is 213131210230969. The next prime is 213131210231041. The reversal of 213131210231000 is 132012131312.

It is a happy number.

213131210231000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213131210231000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 814706219 + ... + 814967781.

It is an arithmetic number, because the mean of its divisors is an integer number (3921007837500).

Almost surely, 2^{213131210231000} is an apocalyptic number.

213131210231000 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 213131210231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250944501600000).

213131210231000 is an abundant number, since it is smaller than the sum of its proper divisors (288757792969000).

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

213131210231000 is a wasteful number, since it uses less digits than its factorization.

213131210231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266746 (or 266732 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213131210231000 its reverse (132012131312), we get a palindrome (213263222362312).

The spelling of 213131210231000 in words is "two hundred thirteen trillion, one hundred thirty-one billion, two hundred ten million, two hundred thirty-one thousand".