31212103311211 has 8 divisors (see below), whose sum is σ = 31268737288800. Its totient is φ = 31155475579200.

The previous prime is 31212103311121. The next prime is 31212103311223. The reversal of 31212103311211 is 11211330121213.

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 31212103311211 - 2³¹ = 31209955827563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212103311271) 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, 8501386 + ... + 11605936.

It is an arithmetic number, because the mean of its divisors is an integer number (3908592161100).

Almost surely, 2^{31212103311211} is an apocalyptic number.

31212103311211 is a deficient number, since it is larger than the sum of its proper divisors (56633977589).

31212103311211 is a wasteful number, since it uses less digits than its factorization.

31212103311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122789.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31212103311211 its reverse (11211330121213), we get a palindrome (42423433432424).

The spelling of 31212103311211 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, three hundred eleven thousand, two hundred eleven".