1212223231143 has 20 divisors (see below), whose sum is σ = 1811060875008. Its totient is φ = 808055598240.

The previous prime is 1212223231139. The next prime is 1212223231157. The reversal of 1212223231143 is 3411323222121.

1212223231143 is a `hidden beast` number, since 1 + 2 + 1 + 222 + 323 + 114 + 3 = 666.

It is not a de Polignac number, because 1212223231143 - 2² = 1212223231139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212223231103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 153063 + ... + 1564568.

Almost surely, 2^{1212223231143} is an apocalyptic number.

1212223231143 is a deficient number, since it is larger than the sum of its proper divisors (598837643865).

1212223231143 is an equidigital number, since it uses as much as digits as its factorization.

1212223231143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726356 (or 1726347 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 1212223231143 its reverse (3411323222121), we get a palindrome (4623546453264).

The spelling of 1212223231143 in words is "one trillion, two hundred twelve billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred forty-three".