3211320421 has 12 divisors (see below), whose sum is σ = 3371076940. Its totient is φ = 3058830720.

The previous prime is 3211320407. The next prime is 3211320433. The reversal of 3211320421 is 1240231123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2822796900 + 388523521 = 53130^2 + 19711^2 .

It is not a de Polignac number, because 3211320421 - 2⁷ = 3211320293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211320401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 114895 + ... + 140083.

Almost surely, 2^3211320421 is an apocalyptic number.

It is an amenable number.

3211320421 is a deficient number, since it is larger than the sum of its proper divisors (159756519).

3211320421 is a wasteful number, since it uses less digits than its factorization.

3211320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25476 (or 25453 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3211320421 is about 56668.5134885326. The cubic root of 3211320421 is about 1475.3482538413.

Adding to 3211320421 its reverse (1240231123), we get a palindrome (4451551544).

The spelling of 3211320421 in words is "three billion, two hundred eleven million, three hundred twenty thousand, four hundred twenty-one".