2021220109969 has 2 divisors, whose sum is σ = 2021220109970. Its totient is φ = 2021220109968.

The previous prime is 2021220109927. The next prime is 2021220110027. The reversal of 2021220109969 is 9699010221202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1556555664400 + 464664445569 = 1247620^2 + 681663^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021220109969 - 2⁹ = 2021220109457 is a prime.

It is a super-2 number, since 2×2021220109969² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021220101969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010610054984 + 1010610054985.

It is an arithmetic number, because the mean of its divisors is an integer number (1010610054985).

Almost surely, 2^{2021220109969} is an apocalyptic number.

It is an amenable number.

2021220109969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021220109969 is an equidigital number, since it uses as much as digits as its factorization.

2021220109969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 2021220109969 in words is "two trillion, twenty-one billion, two hundred twenty million, one hundred nine thousand, nine hundred sixty-nine".