100121011822549 has 2 divisors, whose sum is σ = 100121011822550. Its totient is φ = 100121011822548.

The previous prime is 100121011822529. The next prime is 100121011822591. The reversal of 100121011822549 is 945228110121001.

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., 96204847877649 + 3916163944900 = 9808407^2 + 1978930^2 .

It is a cyclic number.

It is not a de Polignac number, because 100121011822549 - 2⁷ = 100121011822421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121011822529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060505911274 + 50060505911275.

It is an arithmetic number, because the mean of its divisors is an integer number (50060505911275).

Almost surely, 2^{100121011822549} is an apocalyptic number.

It is an amenable number.

100121011822549 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121011822549 is an equidigital number, since it uses as much as digits as its factorization.

100121011822549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 37.

The spelling of 100121011822549 in words is "one hundred trillion, one hundred twenty-one billion, eleven million, eight hundred twenty-two thousand, five hundred forty-nine".