2021001109997 has 2 divisors, whose sum is σ = 2021001109998. Its totient is φ = 2021001109996.

The previous prime is 2021001109979. The next prime is 2021001110039. The reversal of 2021001109997 is 7999011001202.

Together with previous prime (2021001109979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1694490579076 + 326510530921 = 1301726^2 + 571411^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021001109997 - 2¹² = 2021001105901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021001109937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010500554998 + 1010500554999.

It is an arithmetic number, because the mean of its divisors is an integer number (1010500554999).

Almost surely, 2^{2021001109997} is an apocalyptic number.

It is an amenable number.

2021001109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021001109997 is an equidigital number, since it uses as much as digits as its factorization.

2021001109997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 2021001109997 in words is "two trillion, twenty-one billion, one million, one hundred nine thousand, nine hundred ninety-seven".