11220201201997 has 2 divisors, whose sum is σ = 11220201201998. Its totient is φ = 11220201201996.

The previous prime is 11220201201983. The next prime is 11220201202009. The reversal of 11220201201997 is 79910210202211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10580831446761 + 639369755236 = 3252819^2 + 799606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220201201997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220201201197) 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, 5610100600998 + 5610100600999.

It is an arithmetic number, because the mean of its divisors is an integer number (5610100600999).

Almost surely, 2^{11220201201997} is an apocalyptic number.

It is an amenable number.

11220201201997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220201201997 is an equidigital number, since it uses as much as digits as its factorization.

11220201201997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 11220201201997 in words is "eleven trillion, two hundred twenty billion, two hundred one million, two hundred one thousand, nine hundred ninety-seven".