31111200113 has 4 divisors (see below), whose sum is σ = 35555657280. Its totient is φ = 26666742948.

The previous prime is 31111200097. The next prime is 31111200137. The reversal of 31111200113 is 31100211113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31111200113 - 2⁴ = 31111200097 is a prime.

It is a super-2 number, since 2×31111200113² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31111200613) 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, 2222228573 + ... + 2222228586.

It is an arithmetic number, because the mean of its divisors is an integer number (8888914320).

Almost surely, 2^31111200113 is an apocalyptic number.

It is an amenable number.

31111200113 is a deficient number, since it is larger than the sum of its proper divisors (4444457167).

31111200113 is an equidigital number, since it uses as much as digits as its factorization.

31111200113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444457166.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31111200113 its reverse (31100211113), we get a palindrome (62211411226).

The spelling of 31111200113 in words is "thirty-one billion, one hundred eleven million, two hundred thousand, one hundred thirteen".