11421031 has 4 divisors (see below), whose sum is σ = 11461672. Its totient is φ = 11380392.

The previous prime is 11421029. The next prime is 11421037. The reversal of 11421031 is 13012411.

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

It is a cyclic number.

It is not a de Polignac number, because 11421031 - 2¹ = 11421029 is a prime.

It is a super-2 number, since 2×11421031² = 260879898205922, which contains 22 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 (11421037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19896 + ... + 20461.

It is an arithmetic number, because the mean of its divisors is an integer number (2865418).

Almost surely, 2^11421031 is an apocalyptic number.

11421031 is a deficient number, since it is larger than the sum of its proper divisors (40641).

11421031 is an equidigital number, since it uses as much as digits as its factorization.

11421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40640.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 11421031 is about 3379.5015904716. The cubic root of 11421031 is about 225.2000262381.

Adding to 11421031 its reverse (13012411), we get a palindrome (24433442).

The spelling of 11421031 in words is "eleven million, four hundred twenty-one thousand, thirty-one".