20121002211100 has 36 divisors (see below), whose sum is σ = 49900085485264. Its totient is φ = 6898629329280.

The previous prime is 20121002211083. The next prime is 20121002211119. The reversal of 20121002211100 is 111220012102.

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, 14372143737 + ... + 14372145136.

Almost surely, 2^{20121002211100} is an apocalyptic number.

20121002211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121002211100 is an abundant number, since it is smaller than the sum of its proper divisors (29779083274164).

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

20121002211100 is a wasteful number, since it uses less digits than its factorization.

20121002211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28744288894 (or 28744288887 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121002211100 its reverse (111220012102), we get a palindrome (20232222223202).

The spelling of 20121002211100 in words is "twenty trillion, one hundred twenty-one billion, two million, two hundred eleven thousand, one hundred".