321211222112101 has 4 divisors (see below), whose sum is σ = 321212526181804. Its totient is φ = 321209918042400.

The previous prime is 321211222112093. The next prime is 321211222112167. The reversal of 321211222112101 is 101211222112123.

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 189036513393025 + 132174708719076 = 13749055^2 + 11496726^2 .

It is a cyclic number.

It is not a de Polignac number, because 321211222112101 - 2³ = 321211222112093 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 (321211222112171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651665310 + ... + 652158031.

It is an arithmetic number, because the mean of its divisors is an integer number (80303131545451).

Almost surely, 2^{321211222112101} is an apocalyptic number.

It is an amenable number.

321211222112101 is a deficient number, since it is larger than the sum of its proper divisors (1304069703).

321211222112101 is a wasteful number, since it uses less digits than its factorization.

321211222112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304069702.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 321211222112101 its sum of digits (22), we get a palindrome (321211222112123).

Adding to 321211222112101 its reverse (101211222112123), we get a palindrome (422422444224224).

The spelling of 321211222112101 in words is "three hundred twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred one".