1021126356197 has 2 divisors, whose sum is σ = 1021126356198. Its totient is φ = 1021126356196.

The previous prime is 1021126356157. The next prime is 1021126356223. The reversal of 1021126356197 is 7916536211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 915110344996 + 106016011201 = 956614^2 + 325601^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021126356197 - 2¹⁶ = 1021126290661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021126356137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510563178098 + 510563178099.

It is an arithmetic number, because the mean of its divisors is an integer number (510563178099).

Almost surely, 2^{1021126356197} is an apocalyptic number.

It is an amenable number.

1021126356197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021126356197 is an equidigital number, since it uses as much as digits as its factorization.

1021126356197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 1021126356197 in words is "one trillion, twenty-one billion, one hundred twenty-six million, three hundred fifty-six thousand, one hundred ninety-seven".