200102211997 has 2 divisors, whose sum is σ = 200102211998. Its totient is φ = 200102211996.

The previous prime is 200102211971. The next prime is 200102212003. The reversal of 200102211997 is 799112201002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148368254596 + 51733957401 = 385186^2 + 227451^2 .

It is a cyclic number.

It is not a de Polignac number, because 200102211997 - 2¹¹ = 200102209949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200102214997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100051105998 + 100051105999.

It is an arithmetic number, because the mean of its divisors is an integer number (100051105999).

Almost surely, 2^200102211997 is an apocalyptic number.

It is an amenable number.

200102211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

200102211997 is an equidigital number, since it uses as much as digits as its factorization.

200102211997 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 34.

Adding to 200102211997 its reverse (799112201002), we get a palindrome (999214412999).

The spelling of 200102211997 in words is "two hundred billion, one hundred two million, two hundred eleven thousand, nine hundred ninety-seven".