100121000221091 has 2 divisors, whose sum is σ = 100121000221092. Its totient is φ = 100121000221090.

The previous prime is 100121000221049. The next prime is 100121000221111. The reversal of 100121000221091 is 190122000121001.

It is an a-pointer prime, because the next prime (100121000221111) can be obtained adding 100121000221091 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100121000221091 - 2¹⁴ = 100121000204707 is a prime.

It is not a weakly prime, because it can be changed into another prime (100121000221591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060500110545 + 50060500110546.

It is an arithmetic number, because the mean of its divisors is an integer number (50060500110546).

Almost surely, 2^{100121000221091} is an apocalyptic number.

100121000221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121000221091 is an equidigital number, since it uses as much as digits as its factorization.

100121000221091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 100121000221091 its reverse (190122000121001), we get a palindrome (290243000342092).

The spelling of 100121000221091 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-one thousand, ninety-one".