3213131421 has 8 divisors (see below), whose sum is σ = 4304480224. Its totient is φ = 2131935120.

The previous prime is 3213131407. The next prime is 3213131423. The reversal of 3213131421 is 1241313123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3213131421 - 2⁷ = 3213131293 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 (3213131423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2537386 + ... + 2538651.

It is an arithmetic number, because the mean of its divisors is an integer number (538060028).

Almost surely, 2^3213131421 is an apocalyptic number.

It is an amenable number.

3213131421 is a deficient number, since it is larger than the sum of its proper divisors (1091348803).

3213131421 is a wasteful number, since it uses less digits than its factorization.

3213131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076251.

The product of its digits is 432, while the sum is 21.

The square root of 3213131421 is about 56684.4901273708. The cubic root of 3213131421 is about 1475.6255389076.

Adding to 3213131421 its reverse (1241313123), we get a palindrome (4454444544).

The spelling of 3213131421 in words is "three billion, two hundred thirteen million, one hundred thirty-one thousand, four hundred twenty-one".