211201001211997 has 2 divisors, whose sum is σ = 211201001211998. Its totient is φ = 211201001211996.

The previous prime is 211201001211929. The next prime is 211201001212051. The reversal of 211201001211997 is 799112100102112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140064242595876 + 71136758616121 = 11834874^2 + 8434261^2 .

It is a cyclic number.

It is not a de Polignac number, because 211201001211997 - 2¹¹ = 211201001209949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211201001221997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600500605998 + 105600500605999.

It is an arithmetic number, because the mean of its divisors is an integer number (105600500605999).

Almost surely, 2^{211201001211997} is an apocalyptic number.

It is an amenable number.

211201001211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

211201001211997 is an equidigital number, since it uses as much as digits as its factorization.

211201001211997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 37.

The spelling of 211201001211997 in words is "two hundred eleven trillion, two hundred one billion, one million, two hundred eleven thousand, nine hundred ninety-seven".