31123232103 has 8 divisors (see below), whose sum is σ = 43938680688. Its totient is φ = 19528302464.

The previous prime is 31123232087. The next prime is 31123232123. The reversal of 31123232103 is 30123232113.

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

It is a cyclic number.

It is not a de Polignac number, because 31123232103 - 2⁴ = 31123232087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31123232103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123232123) 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, 305129676 + ... + 305129777.

It is an arithmetic number, because the mean of its divisors is an integer number (5492335086).

Almost surely, 2^31123232103 is an apocalyptic number.

31123232103 is a deficient number, since it is larger than the sum of its proper divisors (12815448585).

31123232103 is a wasteful number, since it uses less digits than its factorization.

31123232103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610259473.

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

Adding to 31123232103 its reverse (30123232113), we get a palindrome (61246464216).

The spelling of 31123232103 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred three".