101000121021091 has 2 divisors, whose sum is σ = 101000121021092. Its totient is φ = 101000121021090.

The previous prime is 101000121021073. The next prime is 101000121021101. The reversal of 101000121021091 is 190120121000101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101000121021091 - 2²⁵ = 101000087466659 is a prime.

It is not a weakly prime, because it can be changed into another prime (101000121021011) 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, 50500060510545 + 50500060510546.

It is an arithmetic number, because the mean of its divisors is an integer number (50500060510546).

Almost surely, 2^{101000121021091} is an apocalyptic number.

101000121021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

101000121021091 is an equidigital number, since it uses as much as digits as its factorization.

101000121021091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 101000121021091 its reverse (190120121000101), we get a palindrome (291120242021192).

The spelling of 101000121021091 in words is "one hundred one trillion, one hundred twenty-one million, twenty-one thousand, ninety-one".