11000031031 has 4 divisors (see below), whose sum is σ = 12000033864. Its totient is φ = 10000028200.

The previous prime is 11000031023. The next prime is 11000031043. The reversal of 11000031031 is 13013000011.

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 11000031031 - 2³ = 11000031023 is a prime.

It is a super-2 number, since 2×11000031031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11000030999 and 11000031017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000031001) 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, 500001400 + ... + 500001421.

It is an arithmetic number, because the mean of its divisors is an integer number (3000008466).

Almost surely, 2^11000031031 is an apocalyptic number.

11000031031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11000031031 is a deficient number, since it is larger than the sum of its proper divisors (1000002833).

11000031031 is a wasteful number, since it uses less digits than its factorization.

11000031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000002832.

The product of its (nonzero) digits is 9, while the sum is 10.

Adding to 11000031031 its reverse (13013000011), we get a palindrome (24013031042).

The spelling of 11000031031 in words is "eleven billion, thirty-one thousand, thirty-one".