121001431091 has 2 divisors, whose sum is σ = 121001431092. Its totient is φ = 121001431090.

The previous prime is 121001431027. The next prime is 121001431121. The reversal of 121001431091 is 190134100121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121001431091 - 2⁶ = 121001431027 is a prime.

It is not a weakly prime, because it can be changed into another prime (121001431021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500715545 + 60500715546.

It is an arithmetic number, because the mean of its divisors is an integer number (60500715546).

Almost surely, 2^121001431091 is an apocalyptic number.

121001431091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001431091 is an equidigital number, since it uses as much as digits as its factorization.

121001431091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 121001431091 in words is "one hundred twenty-one billion, one million, four hundred thirty-one thousand, ninety-one".