11123421031 has 8 divisors (see below), whose sum is σ = 11152147328. Its totient is φ = 11094732000.

The previous prime is 11123421013. The next prime is 11123421053. The reversal of 11123421031 is 13012432111.

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 11123421031 - 2⁵ = 11123420999 is a prime.

It is a super-2 number, since 2×11123421031² (a number of 21 digits) 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 (11123421091) 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 7 ways as a sum of consecutive naturals, for example, 646561 + ... + 663541.

It is an arithmetic number, because the mean of its divisors is an integer number (1394018416).

Almost surely, 2^11123421031 is an apocalyptic number.

11123421031 is a deficient number, since it is larger than the sum of its proper divisors (28726297).

11123421031 is an equidigital number, since it uses as much as digits as its factorization.

11123421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18633.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11123421031 its reverse (13012432111), we get a palindrome (24135853142).

The spelling of 11123421031 in words is "eleven billion, one hundred twenty-three million, four hundred twenty-one thousand, thirty-one".