121120342043 has 4 divisors (see below), whose sum is σ = 121121835360. Its totient is φ = 121118848728.

The previous prime is 121120341989. The next prime is 121120342111. The reversal of 121120342043 is 340243021121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340243021121 = 85931 ⋅3959491.

It is a cyclic number.

It is not a de Polignac number, because 121120342043 - 2²⁰ = 121119293467 is a prime.

It is a super-2 number, since 2×121120342043² (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 (121120342243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617555 + ... + 789692.

It is an arithmetic number, because the mean of its divisors is an integer number (30280458840).

Almost surely, 2^121120342043 is an apocalyptic number.

121120342043 is a deficient number, since it is larger than the sum of its proper divisors (1493317).

121120342043 is an equidigital number, since it uses as much as digits as its factorization.

121120342043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493316.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 121120342043 its reverse (340243021121), we get a palindrome (461363363164).

The spelling of 121120342043 in words is "one hundred twenty-one billion, one hundred twenty million, three hundred forty-two thousand, forty-three".