31111234123 has 2 divisors, whose sum is σ = 31111234124. Its totient is φ = 31111234122.

The previous prime is 31111234111. The next prime is 31111234129. The reversal of 31111234123 is 32143211113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31111234123 - 2³³ = 22521299531 is a prime.

It is a super-2 number, since 2×31111234123² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31111234094 and 31111234103.

It is not a weakly prime, because it can be changed into another prime (31111234129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555617061 + 15555617062.

It is an arithmetic number, because the mean of its divisors is an integer number (15555617062).

Almost surely, 2^31111234123 is an apocalyptic number.

31111234123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111234123 is an equidigital number, since it uses as much as digits as its factorization.

31111234123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

Adding to 31111234123 its reverse (32143211113), we get a palindrome (63254445236).

The spelling of 31111234123 in words is "thirty-one billion, one hundred eleven million, two hundred thirty-four thousand, one hundred twenty-three".