20101221110012 has 12 divisors (see below), whose sum is σ = 40202442220080. Its totient is φ = 8614809047136.

The previous prime is 20101221109999. The next prime is 20101221110071. The reversal of 20101221110012 is 21001112210102.

20101221110012 is an admirable number.

It is a super-3 number, since 3×20101221110012³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 358950376937 + ... + 358950376992.

It is an arithmetic number, because the mean of its divisors is an integer number (3350203518340).

Almost surely, 2^{20101221110012} is an apocalyptic number.

It is an amenable number.

20101221110012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20101221110012 is a wasteful number, since it uses less digits than its factorization.

20101221110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717900753940 (or 717900753938 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20101221110012 its reverse (21001112210102), we get a palindrome (41102333320114).

The spelling of 20101221110012 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, one hundred ten thousand, twelve".