1021200122197 has 2 divisors, whose sum is σ = 1021200122198. Its totient is φ = 1021200122196.

The previous prime is 1021200122087. The next prime is 1021200122213. The reversal of 1021200122197 is 7912210021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692413708996 + 328786413201 = 832114^2 + 573399^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021200122197 - 2³⁵ = 986840383829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021200122597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510600061098 + 510600061099.

It is an arithmetic number, because the mean of its divisors is an integer number (510600061099).

Almost surely, 2^{1021200122197} is an apocalyptic number.

It is an amenable number.

1021200122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021200122197 is an equidigital number, since it uses as much as digits as its factorization.

1021200122197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

Adding to 1021200122197 its reverse (7912210021201), we get a palindrome (8933410143398).

The spelling of 1021200122197 in words is "one trillion, twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred ninety-seven".