20111211200010 has 192 divisors, whose sum is σ = 59166815864832. Its totient is φ = 4284439778304.

The previous prime is 20111211199999. The next prime is 20111211200053. The reversal of 20111211200010 is 1000211211102.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4642449 + ... + 7859691.

It is an arithmetic number, because the mean of its divisors is an integer number (308160499296).

Almost surely, 2^{20111211200010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111211200010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29583407932416).

20111211200010 is an abundant number, since it is smaller than the sum of its proper divisors (39055604664822).

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

20111211200010 is a wasteful number, since it uses less digits than its factorization.

20111211200010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217397 (or 3217380 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111211200010 its reverse (1000211211102), we get a palindrome (21111422411112).

The spelling of 20111211200010 in words is "twenty trillion, one hundred eleven billion, two hundred eleven million, two hundred thousand, ten".