312121132201 has 4 divisors (see below), whose sum is σ = 312141482500. Its totient is φ = 312100781904.

The previous prime is 312121132199. The next prime is 312121132229. The reversal of 312121132201 is 102231121213.

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 187769688976 + 124351443225 = 433324^2 + 352635^2 .

It is a cyclic number.

It is not a de Polignac number, because 312121132201 - 2¹ = 312121132199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312121132261) 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 3 ways as a sum of consecutive naturals, for example, 10152126 + ... + 10182823.

It is an arithmetic number, because the mean of its divisors is an integer number (78035370625).

Almost surely, 2^312121132201 is an apocalyptic number.

It is an amenable number.

312121132201 is a deficient number, since it is larger than the sum of its proper divisors (20350299).

312121132201 is a wasteful number, since it uses less digits than its factorization.

312121132201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20350298.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312121132201 its reverse (102231121213), we get a palindrome (414352253414).

The spelling of 312121132201 in words is "three hundred twelve billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred one".