12210031213021 has 4 divisors (see below), whose sum is σ = 12210455628544. Its totient is φ = 12209606797500.

The previous prime is 12210031212997. The next prime is 12210031213109. The reversal of 12210031213021 is 12031213001221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12210031213021 - 2¹¹ = 12210031210973 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 12210031213021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210031219021) 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, 212164605 + ... + 212222146.

It is an arithmetic number, because the mean of its divisors is an integer number (3052613907136).

Almost surely, 2^{12210031213021} is an apocalyptic number.

It is an amenable number.

12210031213021 is a deficient number, since it is larger than the sum of its proper divisors (424415523).

12210031213021 is an equidigital number, since it uses as much as digits as its factorization.

12210031213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424415522.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12210031213021 its reverse (12031213001221), we get a palindrome (24241244214242).

The spelling of 12210031213021 in words is "twelve trillion, two hundred ten billion, thirty-one million, two hundred thirteen thousand, twenty-one".