121001221101091 has 2 divisors, whose sum is σ = 121001221101092. Its totient is φ = 121001221101090.

The previous prime is 121001221101077. The next prime is 121001221101121. The reversal of 121001221101091 is 190101122100121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121001221101091 - 2²¹ = 121001219003939 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001221104091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500610550545 + 60500610550546.

It is an arithmetic number, because the mean of its divisors is an integer number (60500610550546).

Almost surely, 2^{121001221101091} is an apocalyptic number.

121001221101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001221101091 is an equidigital number, since it uses as much as digits as its factorization.

121001221101091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 121001221101091 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-one million, one hundred one thousand, ninety-one".