1001201220997 has 2 divisors, whose sum is σ = 1001201220998. Its totient is φ = 1001201220996.

The previous prime is 1001201220961. The next prime is 1001201221049. The reversal of 1001201220997 is 7990221021001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609564316516 + 391636904481 = 780746^2 + 625809^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001201220997 - 2²³ = 1001192832389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001201220907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600610498 + 500600610499.

It is an arithmetic number, because the mean of its divisors is an integer number (500600610499).

Almost surely, 2^{1001201220997} is an apocalyptic number.

It is an amenable number.

1001201220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201220997 is an equidigital number, since it uses as much as digits as its factorization.

1001201220997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

Adding to 1001201220997 its reverse (7990221021001), we get a palindrome (8991422241998).

The spelling of 1001201220997 in words is "one trillion, one billion, two hundred one million, two hundred twenty thousand, nine hundred ninety-seven".