121010420143 has 2 divisors, whose sum is σ = 121010420144. Its totient is φ = 121010420142.

The previous prime is 121010420123. The next prime is 121010420203. The reversal of 121010420143 is 341024010121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010420143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121010420143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010420123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505210071 + 60505210072.

It is an arithmetic number, because the mean of its divisors is an integer number (60505210072).

Almost surely, 2^121010420143 is an apocalyptic number.

121010420143 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010420143 is an equidigital number, since it uses as much as digits as its factorization.

121010420143 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 121010420143 its reverse (341024010121), we get a palindrome (462034430264).

The spelling of 121010420143 in words is "one hundred twenty-one billion, ten million, four hundred twenty thousand, one hundred forty-three".