12211453531 has 4 divisors (see below), whose sum is σ = 12211756200. Its totient is φ = 12211150864.

The previous prime is 12211453483. The next prime is 12211453537. The reversal of 12211453531 is 13535411221.

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 12211453531 - 2¹⁹ = 12210929243 is a prime.

It is a super-2 number, since 2×12211453531² (a number of 21 digits) contains 22 as substring.

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 12211453531.

It is not an unprimeable number, because it can be changed into a prime (12211453537) 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, 79426 + ... + 175303.

It is an arithmetic number, because the mean of its divisors is an integer number (3052939050).

Almost surely, 2^12211453531 is an apocalyptic number.

12211453531 is a deficient number, since it is larger than the sum of its proper divisors (302669).

12211453531 is an equidigital number, since it uses as much as digits as its factorization.

12211453531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302668.

The product of its digits is 3600, while the sum is 28.

Adding to 12211453531 its reverse (13535411221), we get a palindrome (25746864752).

The spelling of 12211453531 in words is "twelve billion, two hundred eleven million, four hundred fifty-three thousand, five hundred thirty-one".