3211240421 has 4 divisors (see below), whose sum is σ = 3214168812. Its totient is φ = 3208312032.

The previous prime is 3211240393. The next prime is 3211240423. The reversal of 3211240421 is 1240421123.

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

It can be written as a sum of positive squares in 2 ways, for example, as 287675521 + 2923564900 = 16961^2 + 54070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3211240421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3211240393 and 3211240402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211240423) 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, 1462550 + ... + 1464743.

It is an arithmetic number, because the mean of its divisors is an integer number (803542203).

Almost surely, 2^3211240421 is an apocalyptic number.

It is an amenable number.

3211240421 is a deficient number, since it is larger than the sum of its proper divisors (2928391).

3211240421 is a wasteful number, since it uses less digits than its factorization.

3211240421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928390.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 3211240421 is about 56667.8076247882. The cubic root of 3211240421 is about 1475.3360025111.

Adding to 3211240421 its reverse (1240421123), we get a palindrome (4451661544).

The spelling of 3211240421 in words is "three billion, two hundred eleven million, two hundred forty thousand, four hundred twenty-one".