1021010100197 has 2 divisors, whose sum is σ = 1021010100198. Its totient is φ = 1021010100196.

The previous prime is 1021010100163. The next prime is 1021010100233. The reversal of 1021010100197 is 7910010101201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 925455544036 + 95554556161 = 962006^2 + 309119^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021010100197 - 2¹⁸ = 1021009838053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021010102197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510505050098 + 510505050099.

It is an arithmetic number, because the mean of its divisors is an integer number (510505050099).

Almost surely, 2^{1021010100197} is an apocalyptic number.

It is an amenable number.

1021010100197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021010100197 is an equidigital number, since it uses as much as digits as its factorization.

1021010100197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 23.

Adding to 1021010100197 its reverse (7910010101201), we get a palindrome (8931020201398).

The spelling of 1021010100197 in words is "one trillion, twenty-one billion, ten million, one hundred thousand, one hundred ninety-seven".