31201230011 has 4 divisors (see below), whose sum is σ = 35658548592. Its totient is φ = 26743911432.

The previous prime is 31201230001. The next prime is 31201230029. The reversal of 31201230011 is 11003210213.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-31201230011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31201230001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228659280 + ... + 2228659293.

It is an arithmetic number, because the mean of its divisors is an integer number (8914637148).

Almost surely, 2^31201230011 is an apocalyptic number.

31201230011 is a deficient number, since it is larger than the sum of its proper divisors (4457318581).

31201230011 is an equidigital number, since it uses as much as digits as its factorization.

31201230011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457318580.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31201230011 its reverse (11003210213), we get a palindrome (42204440224).

The spelling of 31201230011 in words is "thirty-one billion, two hundred one million, two hundred thirty thousand, eleven".