31212300213 has 16 divisors (see below), whose sum is σ = 48250899840. Its totient is φ = 19903495392.

The previous prime is 31212300211. The next prime is 31212300239. The reversal of 31212300213 is 31200321213.

It is not a de Polignac number, because 31212300213 - 2¹ = 31212300211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212300211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25130056 + ... + 25131297.

It is an arithmetic number, because the mean of its divisors is an integer number (3015681240).

Almost surely, 2^31212300213 is an apocalyptic number.

It is an amenable number.

31212300213 is a deficient number, since it is larger than the sum of its proper divisors (17038599627).

31212300213 is a wasteful number, since it uses less digits than its factorization.

31212300213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50261385 (or 50261379 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31212300213 its reverse (31200321213), we get a palindrome (62412621426).

The spelling of 31212300213 in words is "thirty-one billion, two hundred twelve million, three hundred thousand, two hundred thirteen".