12210131131021 has 4 divisors (see below), whose sum is σ = 12231292537372. Its totient is φ = 12188969724672.

The previous prime is 12210131130943. The next prime is 12210131131027. The reversal of 12210131131021 is 12013113101221.

12210131131021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12165097622500 + 45033508521 = 3487850^2 + 212211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12210131131021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12210131131021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210131131027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10580702310 + ... + 10580703463.

It is an arithmetic number, because the mean of its divisors is an integer number (3057823134343).

Almost surely, 2^{12210131131021} is an apocalyptic number.

It is an amenable number.

12210131131021 is a deficient number, since it is larger than the sum of its proper divisors (21161406351).

12210131131021 is an equidigital number, since it uses as much as digits as its factorization.

12210131131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21161406350.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 12210131131021 its reverse (12013113101221), we get a palindrome (24223244232242).

The spelling of 12210131131021 in words is "twelve trillion, two hundred ten billion, one hundred thirty-one million, one hundred thirty-one thousand, twenty-one".