221112100101 has 32 divisors (see below), whose sum is σ = 304847504640. Its totient is φ = 142478336000.

The previous prime is 221112100051. The next prime is 221112100103. The reversal of 221112100101 is 101001211122.

It is a cyclic number.

It is not a de Polignac number, because 221112100101 - 2⁶ = 221112100037 is a prime.

It is a super-2 number, since 2×221112100101² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112100103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15899251 + ... + 15913151.

It is an arithmetic number, because the mean of its divisors is an integer number (9526484520).

Almost surely, 2^221112100101 is an apocalyptic number.

It is an amenable number.

221112100101 is a deficient number, since it is larger than the sum of its proper divisors (83735404539).

221112100101 is a wasteful number, since it uses less digits than its factorization.

221112100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15437.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221112100101 its reverse (101001211122), we get a palindrome (322113311223).

It can be divided in two parts, 22111 and 2100101, that added together give a palindrome (2122212).

The spelling of 221112100101 in words is "two hundred twenty-one billion, one hundred twelve million, one hundred thousand, one hundred one".