20121121100212 has 48 divisors (see below), whose sum is σ = 40965249648960. Its totient is φ = 8546038387200.

The previous prime is 20121121100207. The next prime is 20121121100221. The reversal of 20121121100212 is 21200112112102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96658239 + ... + 96866182.

It is an arithmetic number, because the mean of its divisors is an integer number (853442701020).

Almost surely, 2^{20121121100212} is an apocalyptic number.

20121121100212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20121121100212 is an abundant number, since it is smaller than the sum of its proper divisors (20844128548748).

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

20121121100212 is a wasteful number, since it uses less digits than its factorization.

20121121100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193524592 (or 193524590 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20121121100212 its reverse (21200112112102), we get a palindrome (41321233212314).

The spelling of 20121121100212 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred twelve".