221112321312301 has 4 divisors (see below), whose sum is σ = 221279703843004. Its totient is φ = 220944938781600.

The previous prime is 221112321312287. The next prime is 221112321312343. The reversal of 221112321312301 is 103213123211122.

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 143786503192201 + 77325818120100 = 11991101^2 + 8793510^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112321312301 - 2¹¹ = 221112321310253 is a prime.

It is a super-2 number, since 2×221112321312301² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112321312361) 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, 83691263370 + ... + 83691266011.

It is an arithmetic number, because the mean of its divisors is an integer number (55319925960751).

Almost surely, 2^{221112321312301} is an apocalyptic number.

It is an amenable number.

221112321312301 is a deficient number, since it is larger than the sum of its proper divisors (167382530703).

221112321312301 is a wasteful number, since it uses less digits than its factorization.

221112321312301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167382530702.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 221112321312301 its reverse (103213123211122), we get a palindrome (324325444523423).

The spelling of 221112321312301 in words is "two hundred twenty-one trillion, one hundred twelve billion, three hundred twenty-one million, three hundred twelve thousand, three hundred one".