3123212100 has 36 divisors (see below), whose sum is σ = 9036494544. Its totient is φ = 832856480.

The previous prime is 3123212051. The next prime is 3123212107. The reversal of 3123212100 is 12123213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3123212100.

It is not an unprimeable number, because it can be changed into a prime (3123212107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5205054 + ... + 5205653.

Almost surely, 2^3123212100 is an apocalyptic number.

3123212100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3123212100 is an abundant number, since it is smaller than the sum of its proper divisors (5913282444).

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

3123212100 is a wasteful number, since it uses less digits than its factorization.

3123212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410724 (or 10410717 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3123212100 is about 55885.7056858013. The cubic root of 3123212100 is about 1461.7299971794.

Adding to 3123212100 its reverse (12123213), we get a palindrome (3135335313).

The spelling of 3123212100 in words is "three billion, one hundred twenty-three million, two hundred twelve thousand, one hundred".