4031312213421 has 6 divisors (see below), whose sum is σ = 5823006530510. Its totient is φ = 2687541475608.

The previous prime is 4031312213419. The next prime is 4031312213431. The reversal of 4031312213421 is 1243122131304.

4031312213421 is a `hidden beast` number, since 4 + 0 + 3 + 1 + 312 + 2 + 1 + 342 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3869635845321 + 161676368100 = 1967139^2 + 402090^2 .

It is not a de Polignac number, because 4031312213421 - 2¹ = 4031312213419 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 (4031312213431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223961789626 + ... + 223961789643.

Almost surely, 2^{4031312213421} is an apocalyptic number.

It is an amenable number.

4031312213421 is a deficient number, since it is larger than the sum of its proper divisors (1791694317089).

4031312213421 is a wasteful number, since it uses less digits than its factorization.

4031312213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447923579275 (or 447923579272 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 4031312213421 its reverse (1243122131304), we get a palindrome (5274434344725).

The spelling of 4031312213421 in words is "four trillion, thirty-one billion, three hundred twelve million, two hundred thirteen thousand, four hundred twenty-one".