121750230091 has 4 divisors (see below), whose sum is σ = 139143120112. Its totient is φ = 104357340072.

The previous prime is 121750230079. The next prime is 121750230191. The reversal of 121750230091 is 190032057121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121750230091 - 2¹¹ = 121750228043 is a prime.

It is a super-2 number, since 2×121750230091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121750230001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8696445000 + ... + 8696445013.

It is an arithmetic number, because the mean of its divisors is an integer number (34785780028).

Almost surely, 2^121750230091 is an apocalyptic number.

121750230091 is a deficient number, since it is larger than the sum of its proper divisors (17392890021).

121750230091 is an equidigital number, since it uses as much as digits as its factorization.

121750230091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17392890020.

The product of its (nonzero) digits is 3780, while the sum is 31.

The spelling of 121750230091 in words is "one hundred twenty-one billion, seven hundred fifty million, two hundred thirty thousand, ninety-one".