121120210243 has 2 divisors, whose sum is σ = 121120210244. Its totient is φ = 121120210242.

The previous prime is 121120210187. The next prime is 121120210291. The reversal of 121120210243 is 342012021121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121120210243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121120210243.

It is not a weakly prime, because it can be changed into another prime (121120210543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560105121 + 60560105122.

It is an arithmetic number, because the mean of its divisors is an integer number (60560105122).

Almost surely, 2^121120210243 is an apocalyptic number.

121120210243 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120210243 is an equidigital number, since it uses as much as digits as its factorization.

121120210243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121120210243 its reverse (342012021121), we get a palindrome (463132231364).

The spelling of 121120210243 in words is "one hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, two hundred forty-three".