31100122123 has 4 divisors (see below), whose sum is σ = 35542996720. Its totient is φ = 26657247528.

The previous prime is 31100122103. The next prime is 31100122171. The reversal of 31100122123 is 32122100113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32122100113 = 293 ⋅109631741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31100122123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31100122097 and 31100122106.

It is not an unprimeable number, because it can be changed into a prime (31100122103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221437288 + ... + 2221437301.

It is an arithmetic number, because the mean of its divisors is an integer number (8885749180).

Almost surely, 2^31100122123 is an apocalyptic number.

31100122123 is a deficient number, since it is larger than the sum of its proper divisors (4442874597).

31100122123 is an equidigital number, since it uses as much as digits as its factorization.

31100122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442874596.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31100122123 its reverse (32122100113), we get a palindrome (63222222236).

The spelling of 31100122123 in words is "thirty-one billion, one hundred million, one hundred twenty-two thousand, one hundred twenty-three".