31111302123 has 32 divisors (see below), whose sum is σ = 50313415680. Its totient is φ = 18843138720.

The previous prime is 31111302097. The next prime is 31111302137. The reversal of 31111302123 is 32120311113.

It is not a de Polignac number, because 31111302123 - 2⁸ = 31111301867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31111302096 and 31111302105.

It is not an unprimeable number, because it can be changed into a prime (31111302143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437065 + ... + 503237.

It is an arithmetic number, because the mean of its divisors is an integer number (1572294240).

Almost surely, 2^31111302123 is an apocalyptic number.

31111302123 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31111302123 is a deficient number, since it is larger than the sum of its proper divisors (19202113557).

31111302123 is a wasteful number, since it uses less digits than its factorization.

31111302123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67776 (or 67770 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31111302123 its reverse (32120311113), we get a palindrome (63231613236).

The spelling of 31111302123 in words is "thirty-one billion, one hundred eleven million, three hundred two thousand, one hundred twenty-three".