2001001097 has 2 divisors, whose sum is σ = 2001001098. Its totient is φ = 2001001096.

The previous prime is 2001001091. The next prime is 2001001103. The reversal of 2001001097 is 7901001002.

It is a balanced prime because it is at equal distance from previous prime (2001001091) and next prime (2001001103).

It can be written as a sum of positive squares in only one way, i.e., 1336341136 + 664659961 = 36556^2 + 25781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001001097 - 2¹⁰ = 2001000073 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001001091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000500548 + 1000500549.

It is an arithmetic number, because the mean of its divisors is an integer number (1000500549).

Almost surely, 2^2001001097 is an apocalyptic number.

It is an amenable number.

2001001097 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001001097 is an equidigital number, since it uses as much as digits as its factorization.

2001001097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2001001097 is about 44732.5507544562. The cubic root of 2001001097 is about 1260.1312320272.

Adding to 2001001097 its reverse (7901001002), we get a palindrome (9902002099).

The spelling of 2001001097 in words is "two billion, one million, one thousand, ninety-seven".