312102212101 has 4 divisors (see below), whose sum is σ = 330461165772. Its totient is φ = 293743258432.

The previous prime is 312102212089. The next prime is 312102212111. The reversal of 312102212101 is 101212201213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 204983468001 + 107118744100 = 452751^2 + 327290^2 .

It is a cyclic number.

It is not a de Polignac number, because 312102212101 - 2²⁵ = 312068657669 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 (312102212111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9179476810 + ... + 9179476843.

It is an arithmetic number, because the mean of its divisors is an integer number (82615291443).

Almost surely, 2^312102212101 is an apocalyptic number.

It is an amenable number.

312102212101 is a deficient number, since it is larger than the sum of its proper divisors (18358953671).

312102212101 is a wasteful number, since it uses less digits than its factorization.

312102212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18358953670.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 312102212101 its reverse (101212201213), we get a palindrome (413314413314).

The spelling of 312102212101 in words is "three hundred twelve billion, one hundred two million, two hundred twelve thousand, one hundred one".