121100430091 has 2 divisors, whose sum is σ = 121100430092. Its totient is φ = 121100430090.

The previous prime is 121100430007. The next prime is 121100430173. The reversal of 121100430091 is 190034001121.

It is a strong prime.

It is an emirp because it is prime and its reverse (190034001121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121100430091 - 2⁷ = 121100429963 is a prime.

It is not a weakly prime, because it can be changed into another prime (121100430491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550215045 + 60550215046.

It is an arithmetic number, because the mean of its divisors is an integer number (60550215046).

Almost surely, 2^121100430091 is an apocalyptic number.

121100430091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100430091 is an equidigital number, since it uses as much as digits as its factorization.

121100430091 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 22.

The spelling of 121100430091 in words is "one hundred twenty-one billion, one hundred million, four hundred thirty thousand, ninety-one".