11223231031 has 4 divisors (see below), whose sum is σ = 11223560200. Its totient is φ = 11222901864.

The previous prime is 11223231029. The next prime is 11223231073. The reversal of 11223231031 is 13013232211.

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 11223231031 - 2¹ = 11223231029 is a prime.

It is a super-2 number, since 2×11223231031² (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 (11223231091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106641 + ... + 183898.

It is an arithmetic number, because the mean of its divisors is an integer number (2805890050).

Almost surely, 2^11223231031 is an apocalyptic number.

11223231031 is a deficient number, since it is larger than the sum of its proper divisors (329169).

11223231031 is an equidigital number, since it uses as much as digits as its factorization.

11223231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329168.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11223231031 its reverse (13013232211), we get a palindrome (24236463242).

It can be divided in two parts, 1122 and 3231031, that added together give a triangular number (3232153 = T₂₅₄₂).

The spelling of 11223231031 in words is "eleven billion, two hundred twenty-three million, two hundred thirty-one thousand, thirty-one".