2021120210969 has 2 divisors, whose sum is σ = 2021120210970. Its totient is φ = 2021120210968.

The previous prime is 2021120210953. The next prime is 2021120210987. The reversal of 2021120210969 is 9690120211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1427547040000 + 593573170969 = 1194800^2 + 770437^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021120210969 - 2⁴ = 2021120210953 is a prime.

It is a super-2 number, since 2×2021120210969² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2021120210939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560105484 + 1010560105485.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560105485).

Almost surely, 2^{2021120210969} is an apocalyptic number.

It is an amenable number.

2021120210969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021120210969 is an equidigital number, since it uses as much as digits as its factorization.

2021120210969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 2021120210969 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred ten thousand, nine hundred sixty-nine".