31103223123 has 8 divisors (see below), whose sum is σ = 47395387648. Its totient is φ = 17773270344.

The previous prime is 31103223101. The next prime is 31103223131. The reversal of 31103223123 is 32132230113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31103223123 - 2⁹ = 31103222611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1481105863 = 31103223123 / (3 + 1 + 1 + 0 + 3 + 2 + 2 + 3 + 1 + 2 + 3).

It is a self number, because there is not a number n which added to its sum of digits gives 31103223123.

It is not an unprimeable number, because it can be changed into a prime (31103223133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740552911 + ... + 740552952.

It is an arithmetic number, because the mean of its divisors is an integer number (5924423456).

Almost surely, 2^31103223123 is an apocalyptic number.

31103223123 is a deficient number, since it is larger than the sum of its proper divisors (16292164525).

31103223123 is a wasteful number, since it uses less digits than its factorization.

31103223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481105873.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31103223123 its reverse (32132230113), we get a palindrome (63235453236).

The spelling of 31103223123 in words is "thirty-one billion, one hundred three million, two hundred twenty-three thousand, one hundred twenty-three".