121410220243 has 4 divisors (see below), whose sum is σ = 130749467968. Its totient is φ = 112070972520.

The previous prime is 121410220223. The next prime is 121410220247. The reversal of 121410220243 is 342022014121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121410220243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121410220247) 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, 4669623843 + ... + 4669623868.

It is an arithmetic number, because the mean of its divisors is an integer number (32687366992).

Almost surely, 2^121410220243 is an apocalyptic number.

121410220243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121410220243 is a deficient number, since it is larger than the sum of its proper divisors (9339247725).

121410220243 is an equidigital number, since it uses as much as digits as its factorization.

121410220243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9339247724.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 121410220243 its reverse (342022014121), we get a palindrome (463432234364).

The spelling of 121410220243 in words is "one hundred twenty-one billion, four hundred ten million, two hundred twenty thousand, two hundred forty-three".