221110100100101 has 4 divisors (see below), whose sum is σ = 232747473789600. Its totient is φ = 209472726410604.

The previous prime is 221110100100067. The next prime is 221110100100103. The reversal of 221110100100101 is 101001001011122.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221110100100101 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 (221110100100103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5818686844721 + ... + 5818686844758.

It is an arithmetic number, because the mean of its divisors is an integer number (58186868447400).

Almost surely, 2^{221110100100101} is an apocalyptic number.

It is an amenable number.

221110100100101 is a deficient number, since it is larger than the sum of its proper divisors (11637373689499).

221110100100101 is a wasteful number, since it uses less digits than its factorization.

221110100100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11637373689498.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 221110100100101 its reverse (101001001011122), we get a palindrome (322111101111223).

The spelling of 221110100100101 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred million, one hundred thousand, one hundred one".