2021020221097 has 2 divisors, whose sum is σ = 2021020221098. Its totient is φ = 2021020221096.

The previous prime is 2021020220959. The next prime is 2021020221133. The reversal of 2021020221097 is 7901220201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2020423445056 + 596776041 = 1421416^2 + 24429^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021020221097 - 2³¹ = 2018872737449 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021020251097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510110548 + 1010510110549.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510110549).

Almost surely, 2^{2021020221097} is an apocalyptic number.

It is an amenable number.

2021020221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021020221097 is an equidigital number, since it uses as much as digits as its factorization.

2021020221097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 2021020221097 its reverse (7901220201202), we get a palindrome (9922240422299).

The spelling of 2021020221097 in words is "two trillion, twenty-one billion, twenty million, two hundred twenty-one thousand, ninety-seven".