123212011320 has 192 divisors, whose sum is σ = 411677903520. Its totient is φ = 31936177152.

The previous prime is 123212011301. The next prime is 123212011367. The reversal of 123212011320 is 23110212321.

123212011320 is a `hidden beast` number, since 1 + 2 + 321 + 20 + 1 + 1 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 123212011293 and 123212011302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14954242 + ... + 14962478.

Almost surely, 2^123212011320 is an apocalyptic number.

123212011320 is a gapful number since it is divisible by the number (10) 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 123212011320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205838951760).

123212011320 is an abundant number, since it is smaller than the sum of its proper divisors (288465892200).

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

123212011320 is a wasteful number, since it uses less digits than its factorization.

123212011320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414 (or 9407 counting only the distinct ones).

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

Adding to 123212011320 its reverse (23110212321), we get a palindrome (146322223641).

The spelling of 123212011320 in words is "one hundred twenty-three billion, two hundred twelve million, eleven thousand, three hundred twenty".