1223130123012 has 96 divisors (see below), whose sum is σ = 3330019753984. Its totient is φ = 342195062400.

The previous prime is 1223130122999. The next prime is 1223130123013. The reversal of 1223130123012 is 2103210313221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1223130123012.

It is not an unprimeable number, because it can be changed into a prime (1223130123013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 607437 + ... + 1677867.

Almost surely, 2^{1223130123012} is an apocalyptic number.

1223130123012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223130123012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665009876992).

1223130123012 is an abundant number, since it is smaller than the sum of its proper divisors (2106889630972).

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

1223130123012 is a wasteful number, since it uses less digits than its factorization.

1223130123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070729 (or 1070727 counting only the distinct ones).

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

Adding to 1223130123012 its reverse (2103210313221), we get a palindrome (3326340436233).

The spelling of 1223130123012 in words is "one trillion, two hundred twenty-three billion, one hundred thirty million, one hundred twenty-three thousand, twelve".