1203123321012 has 12 divisors (see below), whose sum is σ = 2807287749056. Its totient is φ = 401041107000.

The previous prime is 1203123320983. The next prime is 1203123321061. The reversal of 1203123321012 is 2101233213021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1203123321012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50130138364 + ... + 50130138387.

Almost surely, 2^{1203123321012} is an apocalyptic number.

1203123321012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1203123321012 is an abundant number, since it is smaller than the sum of its proper divisors (1604164428044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1203123321012 is a wasteful number, since it uses less digits than its factorization.

1203123321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100260276758 (or 100260276756 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1203123321012 its reverse (2101233213021), we get a palindrome (3304356534033).

The spelling of 1203123321012 in words is "one trillion, two hundred three billion, one hundred twenty-three million, three hundred twenty-one thousand, twelve".