31231010011 has 4 divisors (see below), whose sum is σ = 32874747400. Its totient is φ = 29587272624.

The previous prime is 31231010009. The next prime is 31231010017. The reversal of 31231010011 is 11001013213.

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 31231010011 - 2¹ = 31231010009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31231009973 and 31231010000.

It is not an unprimeable number, because it can be changed into a prime (31231010017) 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, 821868666 + ... + 821868703.

It is an arithmetic number, because the mean of its divisors is an integer number (8218686850).

Almost surely, 2^31231010011 is an apocalyptic number.

31231010011 is a deficient number, since it is larger than the sum of its proper divisors (1643737389).

31231010011 is a wasteful number, since it uses less digits than its factorization.

31231010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643737388.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31231010011 its reverse (11001013213), we get a palindrome (42232023224).

The spelling of 31231010011 in words is "thirty-one billion, two hundred thirty-one million, ten thousand, eleven".