1243110121 has 8 divisors (see below), whose sum is σ = 1369548288. Its totient is φ = 1118910000.

The previous prime is 1243110083. The next prime is 1243110133. The reversal of 1243110121 is 1210113421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243110121 - 2⁷ = 1243109993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243110095 and 1243110104.

It is not an unprimeable number, because it can be changed into a prime (1243110181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558345 + ... + 560566.

It is an arithmetic number, because the mean of its divisors is an integer number (171193536).

Almost surely, 2^1243110121 is an apocalyptic number.

1243110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1243110121 is a deficient number, since it is larger than the sum of its proper divisors (126438167).

1243110121 is a wasteful number, since it uses less digits than its factorization.

1243110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119023.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1243110121 is about 35257.7668181069. The cubic root of 1243110121 is about 1075.2345249269.

Adding to 1243110121 its reverse (1210113421), we get a palindrome (2453223542).

The spelling of 1243110121 in words is "one billion, two hundred forty-three million, one hundred ten thousand, one hundred twenty-one".