4221211231 has 4 divisors (see below), whose sum is σ = 4469517792. Its totient is φ = 3972904672.

The previous prime is 4221211219. The next prime is 4221211237. The reversal of 4221211231 is 1321121224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4221211231 - 2¹⁷ = 4221080159 is a prime.

It is a super-2 number, since 2×4221211231² = 35637248513441070722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4221211199 and 4221211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221211237) 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, 124153255 + ... + 124153288.

It is an arithmetic number, because the mean of its divisors is an integer number (1117379448).

Almost surely, 2^4221211231 is an apocalyptic number.

4221211231 is a deficient number, since it is larger than the sum of its proper divisors (248306561).

4221211231 is a wasteful number, since it uses less digits than its factorization.

4221211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248306560.

The product of its digits is 192, while the sum is 19.

The square root of 4221211231 is about 64970.8490863403. The cubic root of 4221211231 is about 1616.1401823005.

Adding to 4221211231 its reverse (1321121224), we get a palindrome (5542332455).

The spelling of 4221211231 in words is "four billion, two hundred twenty-one million, two hundred eleven thousand, two hundred thirty-one".