121101000091 has 2 divisors, whose sum is σ = 121101000092. Its totient is φ = 121101000090.

The previous prime is 121101000067. The next prime is 121101000101. The reversal of 121101000091 is 190000101121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121101000091 - 2¹³ = 121100991899 is a prime.

It is not a weakly prime, because it can be changed into another prime (121101000011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550500045 + 60550500046.

It is an arithmetic number, because the mean of its divisors is an integer number (60550500046).

Almost surely, 2^121101000091 is an apocalyptic number.

121101000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101000091 is an equidigital number, since it uses as much as digits as its factorization.

121101000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 121101000091 in words is "one hundred twenty-one billion, one hundred one million, ninety-one", and thus it is an aban number.