121043443313 has 4 divisors (see below), whose sum is σ = 130354477428. Its totient is φ = 111732409200.

The previous prime is 121043443277. The next prime is 121043443343. The reversal of 121043443313 is 313344340121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28595824609 + 92447618704 = 169103^2 + 304052^2 .

It is a cyclic number.

It is not a de Polignac number, because 121043443313 - 2⁶ = 121043443249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121043443343) 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, 4655517038 + ... + 4655517063.

It is an arithmetic number, because the mean of its divisors is an integer number (32588619357).

Almost surely, 2^121043443313 is an apocalyptic number.

121043443313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121043443313 is a deficient number, since it is larger than the sum of its proper divisors (9311034115).

121043443313 is an equidigital number, since it uses as much as digits as its factorization.

121043443313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9311034114.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 121043443313 its reverse (313344340121), we get a palindrome (434387783434).

The spelling of 121043443313 in words is "one hundred twenty-one billion, forty-three million, four hundred forty-three thousand, three hundred thirteen".