4243121031 has 4 divisors (see below), whose sum is σ = 5657494712. Its totient is φ = 2828747352.

The previous prime is 4243121027. The next prime is 4243121041. The reversal of 4243121031 is 1301213424.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4243121031 - 2² = 4243121027 is a prime.

It is a super-2 number, since 2×4243121031² = 36008152167429005922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4243120989 and 4243121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243121041) 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, 707186836 + ... + 707186841.

It is an arithmetic number, because the mean of its divisors is an integer number (1414373678).

Almost surely, 2^4243121031 is an apocalyptic number.

4243121031 is a deficient number, since it is larger than the sum of its proper divisors (1414373681).

4243121031 is a wasteful number, since it uses less digits than its factorization.

4243121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414373680.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4243121031 is about 65139.2434021151. The cubic root of 4243121031 is about 1618.9314997196.

Adding to 4243121031 its reverse (1301213424), we get a palindrome (5544334455).

The spelling of 4243121031 in words is "four billion, two hundred forty-three million, one hundred twenty-one thousand, thirty-one".