213131030012120 has 128 divisors (see below), whose sum is σ = 545062153881600. Its totient is φ = 74301167078400.

The previous prime is 213131030012107. The next prime is 213131030012129. The reversal of 213131030012120 is 21210030131312.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 213131030012092 and 213131030012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131030012129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71556605 + ... + 74475564.

It is an arithmetic number, because the mean of its divisors is an integer number (4258298077200).

Almost surely, 2^{213131030012120} is an apocalyptic number.

213131030012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213131030012120 is an abundant number, since it is smaller than the sum of its proper divisors (331931123869480).

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

213131030012120 is a wasteful number, since it uses less digits than its factorization.

213131030012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146032329 (or 146032325 counting only the distinct ones).

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

Adding to 213131030012120 its reverse (21210030131312), we get a palindrome (234341060143432).

The spelling of 213131030012120 in words is "two hundred thirteen trillion, one hundred thirty-one billion, thirty million, twelve thousand, one hundred twenty".