31223222012311 has 8 divisors (see below), whose sum is σ = 35683784606624. Its totient is φ = 26762684994720.

The previous prime is 31223222012291. The next prime is 31223222012317. The reversal of 31223222012311 is 11321022232213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31223222012311 - 2¹⁹ = 31223221488023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223222012317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3702720 + ... + 8726773.

It is an arithmetic number, because the mean of its divisors is an integer number (4460473075828).

Almost surely, 2^{31223222012311} is an apocalyptic number.

31223222012311 is a deficient number, since it is larger than the sum of its proper divisors (4460562594313).

31223222012311 is a wasteful number, since it uses less digits than its factorization.

31223222012311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12788361.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31223222012311 its reverse (11321022232213), we get a palindrome (42544244244524).

The spelling of 31223222012311 in words is "thirty-one trillion, two hundred twenty-three billion, two hundred twenty-two million, twelve thousand, three hundred eleven".