12111322221231 has 4 divisors (see below), whose sum is σ = 16148429628312. Its totient is φ = 8074214814152.

The previous prime is 12111322221223. The next prime is 12111322221233. The reversal of 12111322221231 is 13212222311121.

12111322221231 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 is a cyclic number.

It is not a de Polignac number, because 12111322221231 - 2³ = 12111322221223 is a prime.

It is a super-2 number, since 2×12111322221231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111322221233) 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, 2018553703536 + ... + 2018553703541.

It is an arithmetic number, because the mean of its divisors is an integer number (4037107407078).

Almost surely, 2^{12111322221231} is an apocalyptic number.

12111322221231 is a deficient number, since it is larger than the sum of its proper divisors (4037107407081).

12111322221231 is an equidigital number, since it uses as much as digits as its factorization.

12111322221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037107407080.

The product of its digits is 576, while the sum is 24.

Adding to 12111322221231 its reverse (13212222311121), we get a palindrome (25323544532352).

The spelling of 12111322221231 in words is "twelve trillion, one hundred eleven billion, three hundred twenty-two million, two hundred twenty-one thousand, two hundred thirty-one".