2012020210021 has 8 divisors (see below), whose sum is σ = 2014962645080. Its totient is φ = 2009079700992.

The previous prime is 2012020209923. The next prime is 2012020210043. The reversal of 2012020210021 is 1200120202102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 789812573796 + 1222207636225 = 888714^2 + 1105535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2012020210021 - 2⁷ = 2012020209893 is a prime.

It is a super-3 number, since 3×2012020210021³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012020209983 and 2012020210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012020310021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1615981 + ... + 2575933.

It is an arithmetic number, because the mean of its divisors is an integer number (251870330635).

Almost surely, 2^{2012020210021} is an apocalyptic number.

It is an amenable number.

2012020210021 is a deficient number, since it is larger than the sum of its proper divisors (2942435059).

2012020210021 is a wasteful number, since it uses less digits than its factorization.

2012020210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963015.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2012020210021 its reverse (1200120202102), we get a palindrome (3212140412123).

The spelling of 2012020210021 in words is "two trillion, twelve billion, twenty million, two hundred ten thousand, twenty-one".