102021211110197 has 2 divisors, whose sum is σ = 102021211110198. Its totient is φ = 102021211110196.

The previous prime is 102021211110167. The next prime is 102021211110253. The reversal of 102021211110197 is 791011112120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88630193038321 + 13391018071876 = 9414361^2 + 3659374^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021211110197 - 2¹⁶ = 102021211044661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021211110107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010605555098 + 51010605555099.

It is an arithmetic number, because the mean of its divisors is an integer number (51010605555099).

Almost surely, 2^{102021211110197} is an apocalyptic number.

It is an amenable number.

102021211110197 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021211110197 is an equidigital number, since it uses as much as digits as its factorization.

102021211110197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 29.

Adding to 102021211110197 its reverse (791011112120201), we get a palindrome (893032323230398).

The spelling of 102021211110197 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, one hundred ten thousand, one hundred ninety-seven".