123220205112 has 32 divisors (see below), whose sum is σ = 308076097680. Its totient is φ = 41069990400.

The previous prime is 123220205099. The next prime is 123220205117. The reversal of 123220205112 is 211502022321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220205117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90618 + ... + 504630.

Almost surely, 2^123220205112 is an apocalyptic number.

123220205112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123220205112 is an abundant number, since it is smaller than the sum of its proper divisors (184855892568).

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

123220205112 is a wasteful number, since it uses less digits than its factorization.

123220205112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426423 (or 426419 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 123220205112 its reverse (211502022321), we get a palindrome (334722227433).

The spelling of 123220205112 in words is "one hundred twenty-three billion, two hundred twenty million, two hundred five thousand, one hundred twelve".