31212103113213 has 32 divisors (see below), whose sum is σ = 46982120947200. Its totient is φ = 18257446334400.

The previous prime is 31212103113209. The next prime is 31212103113259. The reversal of 31212103113213 is 31231130121213.

It is not a de Polignac number, because 31212103113213 - 2² = 31212103113209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212103113013) 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 31 ways as a sum of consecutive naturals, for example, 3357603 + ... + 8584736.

It is an arithmetic number, because the mean of its divisors is an integer number (1468191279600).

Almost surely, 2^{31212103113213} is an apocalyptic number.

31212103113213 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31212103113213 is a deficient number, since it is larger than the sum of its proper divisors (15770017833987).

31212103113213 is a wasteful number, since it uses less digits than its factorization.

31212103113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11945113.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31212103113213 its reverse (31231130121213), we get a palindrome (62443233234426).

The spelling of 31212103113213 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, one hundred thirteen thousand, two hundred thirteen".