31212102212101 has 16 divisors (see below), whose sum is σ = 32426211605760. Its totient is φ = 30020702100480.

The previous prime is 31212102212087. The next prime is 31212102212173. The reversal of 31212102212101 is 10121220121213.

It is a cyclic number.

It is not a de Polignac number, because 31212102212101 - 2¹¹ = 31212102210053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212102210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4979395 + ... + 9339088.

It is an arithmetic number, because the mean of its divisors is an integer number (2026638225360).

Almost surely, 2^{31212102212101} is an apocalyptic number.

It is an amenable number.

31212102212101 is a deficient number, since it is larger than the sum of its proper divisors (1214109393659).

31212102212101 is a wasteful number, since it uses less digits than its factorization.

31212102212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14319276.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 31212102212101 its reverse (10121220121213), we get a palindrome (41333322333314).

The spelling of 31212102212101 in words is "thirty-one trillion, two hundred twelve billion, one hundred two million, two hundred twelve thousand, one hundred one".