31431112605123 has 16 divisors (see below), whose sum is σ = 52249122253056. Its totient is φ = 16327850703840.

The previous prime is 31431112605071. The next prime is 31431112605131. The reversal of 31431112605123 is 32150621113413.

It is not a de Polignac number, because 31431112605123 - 2⁸ = 31431112604867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (31431112605163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68032711036 + ... + 68032711497.

It is an arithmetic number, because the mean of its divisors is an integer number (3265570140816).

Almost surely, 2^{31431112605123} is an apocalyptic number.

31431112605123 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

31431112605123 is a deficient number, since it is larger than the sum of its proper divisors (20818009647933).

31431112605123 is a wasteful number, since it uses less digits than its factorization.

31431112605123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136065422554.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 31431112605123 its reverse (32150621113413), we get a palindrome (63581733718536).

The spelling of 31431112605123 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred twelve million, six hundred five thousand, one hundred twenty-three".