31212111203101 has 8 divisors (see below), whose sum is σ = 31236949316664. Its totient is φ = 31187274393600.

The previous prime is 31212111203099. The next prime is 31212111203123. The reversal of 31212111203101 is 10130211121213.

It can be written as a sum of positive squares in 4 ways, for example, as 4666420836100 + 26545690367001 = 2160190^2 + 5152251^2 .

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 31212111203101 - 2¹ = 31212111203099 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 (31212111203131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50736385 + ... + 51347881.

It is an arithmetic number, because the mean of its divisors is an integer number (3904618664583).

Almost surely, 2^{31212111203101} is an apocalyptic number.

It is an amenable number.

31212111203101 is a deficient number, since it is larger than the sum of its proper divisors (24838113563).

31212111203101 is a wasteful number, since it uses less digits than its factorization.

31212111203101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652031.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31212111203101 its reverse (10130211121213), we get a palindrome (41342322324314).

The spelling of 31212111203101 in words is "thirty-one trillion, two hundred twelve billion, one hundred eleven million, two hundred three thousand, one hundred one".