210131121123210 has 128 divisors (see below), whose sum is σ = 581969794498560. Its totient is φ = 47562481334016.

The previous prime is 210131121123191. The next prime is 210131121123241. The reversal of 210131121123210 is 12321121131012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1108723936 + ... + 1108913444.

It is an arithmetic number, because the mean of its divisors is an integer number (4546639019520).

Almost surely, 2^{210131121123210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210131121123210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290984897249280).

210131121123210 is an abundant number, since it is smaller than the sum of its proper divisors (371838673375350).

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

210131121123210 is a wasteful number, since it uses less digits than its factorization.

210131121123210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240892.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 210131121123210 its reverse (12321121131012), we get a palindrome (222452242254222).

The spelling of 210131121123210 in words is "two hundred ten trillion, one hundred thirty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred ten".