4431010012421 has 4 divisors (see below), whose sum is σ = 4431154559244. Its totient is φ = 4430865465600.

The previous prime is 4431010012409. The next prime is 4431010012427. The reversal of 4431010012421 is 1242100101344.

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 4241597916196 + 189412096225 = 2059514^2 + 435215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4431010012421 is a prime.

It is a super-3 number, since 3×4431010012421³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431010012427) 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 3 ways as a sum of consecutive naturals, for example, 72227420 + ... + 72288741.

It is an arithmetic number, because the mean of its divisors is an integer number (1107788639811).

Almost surely, 2^{4431010012421} is an apocalyptic number.

It is an amenable number.

4431010012421 is a deficient number, since it is larger than the sum of its proper divisors (144546823).

4431010012421 is a wasteful number, since it uses less digits than its factorization.

4431010012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144546822.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 4431010012421 its reverse (1242100101344), we get a palindrome (5673110113765).

The spelling of 4431010012421 in words is "four trillion, four hundred thirty-one billion, ten million, twelve thousand, four hundred twenty-one".