2021100220213 has 2 divisors, whose sum is σ = 2021100220214. Its totient is φ = 2021100220212.

The previous prime is 2021100220163. The next prime is 2021100220231. The reversal of 2021100220213 is 3120220011202.

It is a happy number.

Together with next prime (2021100220231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1940942153329 + 80158066884 = 1393177^2 + 283122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021100220213 - 2⁹ = 2021100219701 is a prime.

It is a super-2 number, since 2×2021100220213² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021100220253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010550110106 + 1010550110107.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550110107).

Almost surely, 2^{2021100220213} is an apocalyptic number.

It is an amenable number.

2021100220213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021100220213 is an equidigital number, since it uses as much as digits as its factorization.

2021100220213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2021100220213 its reverse (3120220011202), we get a palindrome (5141320231415).

The spelling of 2021100220213 in words is "two trillion, twenty-one billion, one hundred million, two hundred twenty thousand, two hundred thirteen".