11431021 has 8 divisors (see below), whose sum is σ = 13832640. Its totient is φ = 9221568.

The previous prime is 11431003. The next prime is 11431037. The reversal of 11431021 is 12013411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11431021 - 2¹⁵ = 11398253 is a prime.

It is a super-2 number, since 2×11431021² = 261336482204882, 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 = 11430992 and 11431010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47911 + ... + 48148.

It is an arithmetic number, because the mean of its divisors is an integer number (1729080).

Almost surely, 2^11431021 is an apocalyptic number.

It is an amenable number.

11431021 is a deficient number, since it is larger than the sum of its proper divisors (2401619).

11431021 is an equidigital number, since it uses as much as digits as its factorization.

11431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96083.

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

The square root of 11431021 is about 3380.9792960029. The cubic root of 11431021 is about 225.2656680827.

Adding to 11431021 its reverse (12013411), we get a palindrome (23444432).

The spelling of 11431021 in words is "eleven million, four hundred thirty-one thousand, twenty-one".