12210100 has 36 divisors (see below), whose sum is σ = 30282784. Its totient is φ = 4186080.

The previous prime is 12210067. The next prime is 12210101. The reversal of 12210100 is 101221.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210101) 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, 8022 + ... + 9421.

Almost surely, 2^12210100 is an apocalyptic number.

12210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12210100 is an abundant number, since it is smaller than the sum of its proper divisors (18072684).

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

12210100 is a wasteful number, since it uses less digits than its factorization.

12210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17464 (or 17457 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12210100 is about 3494.2953509971. The cubic root of 12210100 is about 230.2712615494.

Adding to 12210100 its reverse (101221), we get a palindrome (12311321).

The spelling of 12210100 in words is "twelve million, two hundred ten thousand, one hundred".