12021102100 has 72 divisors (see below), whose sum is σ = 29827952000. Its totient is φ = 4119361920.

The previous prime is 12021102061. The next prime is 12021102103. The reversal of 12021102100 is 120112021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021102103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1921177 + ... + 1927423.

Almost surely, 2^12021102100 is an apocalyptic number.

12021102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021102100 is an abundant number, since it is smaller than the sum of its proper divisors (17806849900).

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

12021102100 is a wasteful number, since it uses less digits than its factorization.

12021102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017 (or 9010 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12021102100 its reverse (120112021), we get a palindrome (12141214121).

The spelling of 12021102100 in words is "twelve billion, twenty-one million, one hundred two thousand, one hundred".