2010221000021 has 4 divisors (see below), whose sum is σ = 2164853384652. Its totient is φ = 1855588615392.

The previous prime is 2010220999991. The next prime is 2010221000027. The reversal of 2010221000021 is 1200001220102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 477356628100 + 1532864371921 = 690910^2 + 1238089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010221000021 - 2⁶ = 2010220999957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010220999966 and 2010221000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010221000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77316192296 + ... + 77316192321.

It is an arithmetic number, because the mean of its divisors is an integer number (541213346163).

Almost surely, 2^{2010221000021} is an apocalyptic number.

It is an amenable number.

2010221000021 is a deficient number, since it is larger than the sum of its proper divisors (154632384631).

2010221000021 is a wasteful number, since it uses less digits than its factorization.

2010221000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154632384630.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2010221000021 its reverse (1200001220102), we get a palindrome (3210222220123).

The spelling of 2010221000021 in words is "two trillion, ten billion, two hundred twenty-one million, twenty-one", and thus it is an aban number.