11421043031 has 4 divisors (see below), whose sum is σ = 11581902864. Its totient is φ = 11260183200.

The previous prime is 11421043019. The next prime is 11421043057. The reversal of 11421043031 is 13034012411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11421043031 is a prime.

It is a super-2 number, since 2×11421043031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11421042994 and 11421043012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421043061) 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, 80429810 + ... + 80429951.

It is an arithmetic number, because the mean of its divisors is an integer number (2895475716).

Almost surely, 2^11421043031 is an apocalyptic number.

11421043031 is a deficient number, since it is larger than the sum of its proper divisors (160859833).

11421043031 is an equidigital number, since it uses as much as digits as its factorization.

11421043031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160859832.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11421043031 its reverse (13034012411), we get a palindrome (24455055442).

The spelling of 11421043031 in words is "eleven billion, four hundred twenty-one million, forty-three thousand, thirty-one".