221421141 has 16 divisors (see below), whose sum is σ = 347328000. Its totient is φ = 138930624.

The previous prime is 221421133. The next prime is 221421157. The reversal of 221421141 is 141124122.

It is not a de Polignac number, because 221421141 - 2³ = 221421133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240741 + ... + 241658.

It is an arithmetic number, because the mean of its divisors is an integer number (21708000).

Almost surely, 2^221421141 is an apocalyptic number.

It is an amenable number.

221421141 is a deficient number, since it is larger than the sum of its proper divisors (125906859).

221421141 is a wasteful number, since it uses less digits than its factorization.

221421141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482425 (or 482419 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 221421141 is about 14880.2265103728. The cubic root of 221421141 is about 604.9781573518.

Adding to 221421141 its reverse (141124122), we get a palindrome (362545263).

The spelling of 221421141 in words is "two hundred twenty-one million, four hundred twenty-one thousand, one hundred forty-one".