12123210100 has 18 divisors (see below), whose sum is σ = 26307366134. Its totient is φ = 4849284000.

The previous prime is 12123210097. The next prime is 12123210101. The reversal of 12123210100 is 101232121.

It can be written as a sum of positive squares in 3 ways, for example, as 534256996 + 11588953104 = 23114^2 + 107652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123210101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60615951 + ... + 60616150.

Almost surely, 2^12123210100 is an apocalyptic number.

12123210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123210100 is an abundant number, since it is smaller than the sum of its proper divisors (14184156034).

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

12123210100 is a wasteful number, since it uses less digits than its factorization.

12123210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121232115 (or 121232108 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12123210100 its reverse (101232121), we get a palindrome (12224442221).

The spelling of 12123210100 in words is "twelve billion, one hundred twenty-three million, two hundred ten thousand, one hundred".