31103311013111 has 4 divisors (see below), whose sum is σ = 32932917543312. Its totient is φ = 29273704482912.

The previous prime is 31103311013053. The next prime is 31103311013123. The reversal of 31103311013111 is 11131011330113.

It is a happy number.

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 31103311013111 - 2³⁴ = 31086131143927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103311010111) 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, 914803265075 + ... + 914803265108.

It is an arithmetic number, because the mean of its divisors is an integer number (8233229385828).

Almost surely, 2^{31103311013111} is an apocalyptic number.

31103311013111 is a deficient number, since it is larger than the sum of its proper divisors (1829606530201).

31103311013111 is a wasteful number, since it uses less digits than its factorization.

31103311013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829606530200.

The product of its (nonzero) digits is 81, while the sum is 20.

Adding to 31103311013111 its reverse (11131011330113), we get a palindrome (42234322343224).

The spelling of 31103311013111 in words is "thirty-one trillion, one hundred three billion, three hundred eleven million, thirteen thousand, one hundred eleven".