221102101 has 4 divisors (see below), whose sum is σ = 241202304. Its totient is φ = 201001900.

The previous prime is 221102099. The next prime is 221102113. The reversal of 221102101 is 101201122.

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 not a de Polignac number, because 221102101 - 2¹ = 221102099 is a prime.

It is a super-2 number, since 2×221102101² = 97772278133228402, which 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 (221102191) 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, 10050085 + ... + 10050106.

It is an arithmetic number, because the mean of its divisors is an integer number (60300576).

Almost surely, 2^221102101 is an apocalyptic number.

It is an amenable number.

221102101 is a deficient number, since it is larger than the sum of its proper divisors (20100203).

221102101 is a wasteful number, since it uses less digits than its factorization.

221102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20100202.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 221102101 is about 14869.5023790307. The cubic root of 221102101 is about 604.6874518861.

Adding to 221102101 its reverse (101201122), we get a palindrome (322303223).

The spelling of 221102101 in words is "two hundred twenty-one million, one hundred two thousand, one hundred one".