2021010210221 has 16 divisors (see below), whose sum is σ = 2139581347200. Its totient is φ = 1905708856128.

The previous prime is 2021010210203. The next prime is 2021010210223. The reversal of 2021010210221 is 1220120101202.

It is a cyclic number.

It is not a de Polignac number, because 2021010210221 - 2¹⁸ = 2021009948077 is a prime.

It is a super-2 number, since 2×2021010210221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021010210196 and 2021010210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021010210223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10626200 + ... + 10814718.

It is an arithmetic number, because the mean of its divisors is an integer number (133723834200).

Almost surely, 2^{2021010210221} is an apocalyptic number.

It is an amenable number.

2021010210221 is a deficient number, since it is larger than the sum of its proper divisors (118571136979).

2021010210221 is a wasteful number, since it uses less digits than its factorization.

2021010210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197188.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021010210221 its reverse (1220120101202), we get a palindrome (3241130311423).

The spelling of 2021010210221 in words is "two trillion, twenty-one billion, ten million, two hundred ten thousand, two hundred twenty-one".