312201211221201 has 4 divisors (see below), whose sum is σ = 416268281628272. Its totient is φ = 208134140814132.

The previous prime is 312201211221139. The next prime is 312201211221209. The reversal of 312201211221201 is 102122112102213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 312201211221201 - 2²⁶ = 312201144112337 is a prime.

It is a super-2 number, since 2×312201211221201² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312201211221209) 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, 52033535203531 + ... + 52033535203536.

It is an arithmetic number, because the mean of its divisors is an integer number (104067070407068).

Almost surely, 2^{312201211221201} is an apocalyptic number.

It is an amenable number.

312201211221201 is a deficient number, since it is larger than the sum of its proper divisors (104067070407071).

312201211221201 is a wasteful number, since it uses less digits than its factorization.

312201211221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104067070407070.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 312201211221201 its reverse (102122112102213), we get a palindrome (414323323323414).

The spelling of 312201211221201 in words is "three hundred twelve trillion, two hundred one billion, two hundred eleven million, two hundred twenty-one thousand, two hundred one".