123421013012 has 36 divisors (see below), whose sum is σ = 237987787380. Its totient is φ = 55963205760.

The previous prime is 123421013011. The next prime is 123421013071. The reversal of 123421013012 is 210310124321.

It can be written as a sum of positive squares in 2 ways, for example, as 76194769156 + 47226243856 = 276034^2 + 217316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421013011) 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 11 ways as a sum of consecutive naturals, for example, 113783 + ... + 509694.

Almost surely, 2^123421013012 is an apocalyptic number.

It is an amenable number.

123421013012 is a deficient number, since it is larger than the sum of its proper divisors (114566774368).

123421013012 is a wasteful number, since it uses less digits than its factorization.

123421013012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623912 (or 623899 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123421013012 its reverse (210310124321), we get a palindrome (333731137333).

The spelling of 123421013012 in words is "one hundred twenty-three billion, four hundred twenty-one million, thirteen thousand, twelve".