20121121000212 has 96 divisors (see below), whose sum is σ = 48873724099200. Its totient is φ = 6435041905152.

The previous prime is 20121121000171. The next prime is 20121121000217. The reversal of 20121121000212 is 21200012112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121121000191 and 20121121000200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121121000217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426370714 + ... + 426417902.

It is an arithmetic number, because the mean of its divisors is an integer number (509101292700).

Almost surely, 2^{20121121000212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20121121000212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24436862049600).

20121121000212 is an abundant number, since it is smaller than the sum of its proper divisors (28752603098988).

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

20121121000212 is a wasteful number, since it uses less digits than its factorization.

20121121000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54905 (or 54903 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121121000212 its reverse (21200012112102), we get a palindrome (41321133112314).

The spelling of 20121121000212 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve", and thus it is an aban number.