2021100121012 has 12 divisors (see below), whose sum is σ = 4042200242080. Its totient is φ = 866185766136.

The previous prime is 2021100120997. The next prime is 2021100121031. The reversal of 2021100121012 is 2101210011202.

2021100121012 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2021100120983 and 2021100121001.

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 3 ways as a sum of consecutive naturals, for example, 36091073562 + ... + 36091073617.

Almost surely, 2^{2021100121012} is an apocalyptic number.

It is an amenable number.

2021100121012 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.

2021100121012 is a wasteful number, since it uses less digits than its factorization.

2021100121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72182147190 (or 72182147188 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021100121012 its reverse (2101210011202), we get a palindrome (4122310132214).

The spelling of 2021100121012 in words is "two trillion, twenty-one billion, one hundred million, one hundred twenty-one thousand, twelve".