221131022 has 24 divisors (see below), whose sum is σ = 388111176. Its totient is φ = 94215408.

The previous prime is 221130977. The next prime is 221131073. The reversal of 221131022 is 220131122.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 221130988 and 221131006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10433 + ... + 23475.

It is an arithmetic number, because the mean of its divisors is an integer number (16171299).

Almost surely, 2^221131022 is an apocalyptic number.

221131022 is a deficient number, since it is larger than the sum of its proper divisors (166980154).

221131022 is a wasteful number, since it uses less digits than its factorization.

221131022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13232 (or 13225 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221131022 is about 14870.4748411071. The cubic root of 221131022 is about 604.7138158801.

Adding to 221131022 its reverse (220131122), we get a palindrome (441262144).

It can be divided in two parts, 2211 and 31022, that added together give a palindrome (33233).

The spelling of 221131022 in words is "two hundred twenty-one million, one hundred thirty-one thousand, twenty-two".