11021144531 has 8 divisors (see below), whose sum is σ = 11527017984. Its totient is φ = 10517495560.

The previous prime is 11021144513. The next prime is 11021144549. The reversal of 11021144531 is 13544112011.

It is an interprime number because it is at equal distance from previous prime (11021144513) and next prime (11021144549).

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 11021144531 - 2⁶ = 11021144467 is a prime.

It is a super-2 number, since 2×11021144531² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021144497 and 11021144506.

It is not an unprimeable number, because it can be changed into a prime (11021144581) 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, 545981 + ... + 565806.

It is an arithmetic number, because the mean of its divisors is an integer number (1440877248).

Almost surely, 2^11021144531 is an apocalyptic number.

11021144531 is a deficient number, since it is larger than the sum of its proper divisors (505873453).

11021144531 is a wasteful number, since it uses less digits than its factorization.

11021144531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112241.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 11021144531 its reverse (13544112011), we get a palindrome (24565256542).

The spelling of 11021144531 in words is "eleven billion, twenty-one million, one hundred forty-four thousand, five hundred thirty-one".