20011201201097 has 2 divisors, whose sum is σ = 20011201201098. Its totient is φ = 20011201201096.

The previous prime is 20011201201091. The next prime is 20011201201171. The reversal of 20011201201097 is 79010210211002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18751013099536 + 1260188101561 = 4330244^2 + 1122581^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011201201097 - 2⁴ = 20011201201081 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011201201091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005600600548 + 10005600600549.

It is an arithmetic number, because the mean of its divisors is an integer number (10005600600549).

Almost surely, 2^{20011201201097} is an apocalyptic number.

It is an amenable number.

20011201201097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011201201097 is an equidigital number, since it uses as much as digits as its factorization.

20011201201097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

Adding to 20011201201097 its reverse (79010210211002), we get a palindrome (99021411412099).

The spelling of 20011201201097 in words is "twenty trillion, eleven billion, two hundred one million, two hundred one thousand, ninety-seven".