122420143 has 2 divisors, whose sum is σ = 122420144. Its totient is φ = 122420142.

The previous prime is 122420119. The next prime is 122420153. The reversal of 122420143 is 341024221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122420143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122420143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122420153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61210071 + 61210072.

It is an arithmetic number, because the mean of its divisors is an integer number (61210072).

Almost surely, 2^122420143 is an apocalyptic number.

122420143 is a deficient number, since it is larger than the sum of its proper divisors (1).

122420143 is an equidigital number, since it uses as much as digits as its factorization.

122420143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 122420143 is about 11064.3636509290. The cubic root of 122420143 is about 496.5362509606.

Adding to 122420143 its reverse (341024221), we get a palindrome (463444364).

The spelling of 122420143 in words is "one hundred twenty-two million, four hundred twenty thousand, one hundred forty-three".