221102042 has 16 divisors (see below), whose sum is σ = 380185152. Its totient is φ = 94469760.

The previous prime is 221102039. The next prime is 221102071. The reversal of 221102042 is 240201122.

221102042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221102042² = 97772225953139528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19223 + ... + 28490.

It is an arithmetic number, because the mean of its divisors is an integer number (23761572).

Almost surely, 2^221102042 is an apocalyptic number.

221102042 is a deficient number, since it is larger than the sum of its proper divisors (159083110).

221102042 is a wasteful number, since it uses less digits than its factorization.

221102042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48053.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221102042 is about 14869.5003951041. The cubic root of 221102042 is about 604.6873981002.

Adding to 221102042 its reverse (240201122), we get a palindrome (461303164).

The spelling of 221102042 in words is "two hundred twenty-one million, one hundred two thousand, forty-two".