200121111097 has 2 divisors, whose sum is σ = 200121111098. Its totient is φ = 200121111096.

The previous prime is 200121111089. The next prime is 200121111131. The reversal of 200121111097 is 790111121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198827701801 + 1293409296 = 445901^2 + 35964^2 .

It is a cyclic number.

It is not a de Polignac number, because 200121111097 - 2³ = 200121111089 is a prime.

It is not a weakly prime, because it can be changed into another prime (200121111067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060555548 + 100060555549.

It is an arithmetic number, because the mean of its divisors is an integer number (100060555549).

Almost surely, 2^200121111097 is an apocalyptic number.

It is an amenable number.

200121111097 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121111097 is an equidigital number, since it uses as much as digits as its factorization.

200121111097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 200121111097 its reverse (790111121002), we get a palindrome (990232232099).

The spelling of 200121111097 in words is "two hundred billion, one hundred twenty-one million, one hundred eleven thousand, ninety-seven".