12021221300 has 36 divisors (see below), whose sum is σ = 28457511936. Its totient is φ = 4371352800.

The previous prime is 12021221299. The next prime is 12021221351. The reversal of 12021221300 is 312212021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5463092 + ... + 5465291.

Almost surely, 2^12021221300 is an apocalyptic number.

12021221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021221300 is an abundant number, since it is smaller than the sum of its proper divisors (16436290636).

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

12021221300 is a wasteful number, since it uses less digits than its factorization.

12021221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928408 (or 10928401 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12021221300 its reverse (312212021), we get a palindrome (12333433321).

The spelling of 12021221300 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, three hundred".