312221223143 has 2 divisors, whose sum is σ = 312221223144. Its totient is φ = 312221223142.

The previous prime is 312221223131. The next prime is 312221223157. The reversal of 312221223143 is 341322122213.

It is a weak prime.

It is an emirp because it is prime and its reverse (341322122213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312221223143 - 2⁶ = 312221223079 is a prime.

It is a super-3 number, since 3×312221223143³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312221223113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110611571 + 156110611572.

It is an arithmetic number, because the mean of its divisors is an integer number (156110611572).

Almost surely, 2^312221223143 is an apocalyptic number.

312221223143 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221223143 is an equidigital number, since it uses as much as digits as its factorization.

312221223143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

Adding to 312221223143 its reverse (341322122213), we get a palindrome (653543345356).

The spelling of 312221223143 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred twenty-three thousand, one hundred forty-three".