123112031012 has 24 divisors (see below), whose sum is σ = 217794806040. Its totient is φ = 60885688320.

The previous prime is 123112030991. The next prime is 123112031051. The reversal of 123112031012 is 210130211321.

It can be written as a sum of positive squares in 4 ways, for example, as 1969051876 + 121142979136 = 44374^2 + 348056^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575564 + ... + 759932.

It is an arithmetic number, because the mean of its divisors is an integer number (9074783585).

Almost surely, 2^123112031012 is an apocalyptic number.

It is an amenable number.

123112031012 is a deficient number, since it is larger than the sum of its proper divisors (94682775028).

123112031012 is a wasteful number, since it uses less digits than its factorization.

123112031012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186191 (or 186189 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123112031012 its reverse (210130211321), we get a palindrome (333242242333).

The spelling of 123112031012 in words is "one hundred twenty-three billion, one hundred twelve million, thirty-one thousand, twelve".