221112100331 has 4 divisors (see below), whose sum is σ = 225816613152. Its totient is φ = 216407587512.

The previous prime is 221112100301. The next prime is 221112100379. The reversal of 221112100331 is 133001211122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221112100331 is a prime.

It is a super-2 number, since 2×221112100331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221112100301) 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, 2352256340 + ... + 2352256433.

It is an arithmetic number, because the mean of its divisors is an integer number (56454153288).

Almost surely, 2^221112100331 is an apocalyptic number.

221112100331 is a deficient number, since it is larger than the sum of its proper divisors (4704512821).

221112100331 is an equidigital number, since it uses as much as digits as its factorization.

221112100331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4704512820.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221112100331 its reverse (133001211122), we get a palindrome (354113311453).

The spelling of 221112100331 in words is "two hundred twenty-one billion, one hundred twelve million, one hundred thousand, three hundred thirty-one".