4031430121 has 4 divisors (see below), whose sum is σ = 4032252292. Its totient is φ = 4030607952.

The previous prime is 4031430113. The next prime is 4031430131. The reversal of 4031430121 is 1210341304.

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 2168299225 + 1863130896 = 46565^2 + 43164^2 .

It is a cyclic number.

It is not a de Polignac number, because 4031430121 - 2³ = 4031430113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4031430131) 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, 403686 + ... + 413551.

It is an arithmetic number, because the mean of its divisors is an integer number (1008063073).

Almost surely, 2^4031430121 is an apocalyptic number.

It is an amenable number.

4031430121 is a deficient number, since it is larger than the sum of its proper divisors (822171).

4031430121 is an equidigital number, since it uses as much as digits as its factorization.

4031430121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822170.

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

The square root of 4031430121 is about 63493.5439316471. The cubic root of 4031430121 is about 1591.5478934766.

Adding to 4031430121 its reverse (1210341304), we get a palindrome (5241771425).

The spelling of 4031430121 in words is "four billion, thirty-one million, four hundred thirty thousand, one hundred twenty-one".