20121133300 has 18 divisors (see below), whose sum is σ = 43662859478. Its totient is φ = 8048453280.

The previous prime is 20121133297. The next prime is 20121133321. The reversal of 20121133300 is 333112102.

It can be written as a sum of positive squares in 3 ways, for example, as 827367696 + 19293765604 = 28764^2 + 138902^2 .

It is a congruent number.

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, 100605567 + ... + 100605766.

Almost surely, 2^20121133300 is an apocalyptic number.

20121133300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121133300 is an abundant number, since it is smaller than the sum of its proper divisors (23541726178).

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

20121133300 is a wasteful number, since it uses less digits than its factorization.

20121133300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201211347 (or 201211340 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20121133300 its reverse (333112102), we get a palindrome (20454245402).

The spelling of 20121133300 in words is "twenty billion, one hundred twenty-one million, one hundred thirty-three thousand, three hundred".