12021000100 has 18 divisors (see below), whose sum is σ = 26085570434. Its totient is φ = 4808400000.

The previous prime is 12021000091. The next prime is 12021000127. The reversal of 12021000100 is 100012021.

It can be written as a sum of positive squares in 3 ways, for example, as 88059456 + 11932940644 = 9384^2 + 109238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60104901 + ... + 60105100.

Almost surely, 2^12021000100 is an apocalyptic number.

12021000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021000100 is an abundant number, since it is smaller than the sum of its proper divisors (14064570334).

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

12021000100 is a wasteful number, since it uses less digits than its factorization.

12021000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120210015 (or 120210008 counting only the distinct ones).

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

Adding to 12021000100 its reverse (100012021), we get a palindrome (12121012121).

The spelling of 12021000100 in words is "twelve billion, twenty-one million, one hundred", and thus it is an aban number.