123020113212 has 18 divisors (see below), whose sum is σ = 310967508488. Its totient is φ = 41006704392.

The previous prime is 123020113211. The next prime is 123020113213. The reversal of 123020113212 is 212311020321.

123020113212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (123020113211) and next prime (123020113213).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020113211) 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 5 ways as a sum of consecutive naturals, for example, 1708612648 + ... + 1708612719.

Almost surely, 2^123020113212 is an apocalyptic number.

123020113212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123020113212 is an abundant number, since it is smaller than the sum of its proper divisors (187947395276).

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

123020113212 is a wasteful number, since it uses less digits than its factorization.

123020113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417225377 (or 3417225372 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123020113212 its reverse (212311020321), we get a palindrome (335331133533).

The spelling of 123020113212 in words is "one hundred twenty-three billion, twenty million, one hundred thirteen thousand, two hundred twelve".