121001020120091 has 2 divisors, whose sum is σ = 121001020120092. Its totient is φ = 121001020120090.

The previous prime is 121001020120051. The next prime is 121001020120133. The reversal of 121001020120091 is 190021020100121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121001020120091 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001020120051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500510060045 + 60500510060046.

It is an arithmetic number, because the mean of its divisors is an integer number (60500510060046).

Almost surely, 2^{121001020120091} is an apocalyptic number.

121001020120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001020120091 is an equidigital number, since it uses as much as digits as its factorization.

121001020120091 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.

The spelling of 121001020120091 in words is "one hundred twenty-one trillion, one billion, twenty million, one hundred twenty thousand, ninety-one".