100121001021161 has 2 divisors, whose sum is σ = 100121001021162. Its totient is φ = 100121001021160.

The previous prime is 100121001021071. The next prime is 100121001021169. The reversal of 100121001021161 is 161120100121001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97152464994025 + 2968536027136 = 9856595^2 + 1722944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121001021161 is a prime.

It is not a weakly prime, because it can be changed into another prime (100121001021169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060500510580 + 50060500510581.

It is an arithmetic number, because the mean of its divisors is an integer number (50060500510581).

Almost surely, 2^{100121001021161} is an apocalyptic number.

It is an amenable number.

100121001021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121001021161 is an equidigital number, since it uses as much as digits as its factorization.

100121001021161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 100121001021161 its reverse (161120100121001), we get a palindrome (261241101142162).

The spelling of 100121001021161 in words is "one hundred trillion, one hundred twenty-one billion, one million, twenty-one thousand, one hundred sixty-one".