201021121002012 has 48 divisors (see below), whose sum is σ = 476089814269440. Its totient is φ = 66001417270272.

The previous prime is 201021121002007. The next prime is 201021121002029. The reversal of 201021121002012 is 210200121120102.

It is a junction number, because it is equal to n+sod(n) for n = 201021121001982 and 201021121002000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821668 + ... + 20067819.

It is an arithmetic number, because the mean of its divisors is an integer number (9918537797280).

Almost surely, 2^{201021121002012} is an apocalyptic number.

It is an amenable number.

201021121002012 is an abundant number, since it is smaller than the sum of its proper divisors (275068693267428).

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

201021121002012 is a wasteful number, since it uses less digits than its factorization.

201021121002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20901530 (or 20901528 counting only the distinct ones).

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

Adding to 201021121002012 its reverse (210200121120102), we get a palindrome (411221242122114).

The spelling of 201021121002012 in words is "two hundred one trillion, twenty-one billion, one hundred twenty-one million, two thousand, twelve".