2021111001097 has 2 divisors, whose sum is σ = 2021111001098. Its totient is φ = 2021111001096.

The previous prime is 2021111001083. The next prime is 2021111001179. The reversal of 2021111001097 is 7901001111202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1952668069641 + 68442931456 = 1397379^2 + 261616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021111001097 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021111041097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555500548 + 1010555500549.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555500549).

Almost surely, 2^{2021111001097} is an apocalyptic number.

It is an amenable number.

2021111001097 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021111001097 is an equidigital number, since it uses as much as digits as its factorization.

2021111001097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 2021111001097 its reverse (7901001111202), we get a palindrome (9922112112299).

The spelling of 2021111001097 in words is "two trillion, twenty-one billion, one hundred eleven million, one thousand, ninety-seven".