12210000021231 has 4 divisors (see below), whose sum is σ = 16280000028312. Its totient is φ = 8140000014152.

The previous prime is 12210000021227. The next prime is 12210000021283. The reversal of 12210000021231 is 13212000001221.

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

It is a cyclic number.

It is not a de Polignac number, because 12210000021231 - 2² = 12210000021227 is a prime.

It is a super-2 number, since 2×12210000021231² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12210000021231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210000031231) 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, 2035000003536 + ... + 2035000003541.

It is an arithmetic number, because the mean of its divisors is an integer number (4070000007078).

Almost surely, 2^{12210000021231} is an apocalyptic number.

12210000021231 is a deficient number, since it is larger than the sum of its proper divisors (4070000007081).

12210000021231 is an equidigital number, since it uses as much as digits as its factorization.

12210000021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070000007080.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12210000021231 its reverse (13212000001221), we get a palindrome (25422000022452).

The spelling of 12210000021231 in words is "twelve trillion, two hundred ten billion, twenty-one thousand, two hundred thirty-one".