20202111011197 has 2 divisors, whose sum is σ = 20202111011198. Its totient is φ = 20202111011196.

The previous prime is 20202111011177. The next prime is 20202111011209. The reversal of 20202111011197 is 79111011120202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15700780181241 + 4501330829956 = 3962421^2 + 2121634^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202111011197 - 2²⁷ = 20201976793469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202111011177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101055505598 + 10101055505599.

It is an arithmetic number, because the mean of its divisors is an integer number (10101055505599).

Almost surely, 2^{20202111011197} is an apocalyptic number.

It is an amenable number.

20202111011197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202111011197 is an equidigital number, since it uses as much as digits as its factorization.

20202111011197 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 28.

Adding to 20202111011197 its reverse (79111011120202), we get a palindrome (99313122131399).

The spelling of 20202111011197 in words is "twenty trillion, two hundred two billion, one hundred eleven million, eleven thousand, one hundred ninety-seven".