121324144421 has 2 divisors, whose sum is σ = 121324144422. Its totient is φ = 121324144420.

The previous prime is 121324144399. The next prime is 121324144441. The reversal of 121324144421 is 124441423121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112691133025 + 8633011396 = 335695^2 + 92914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121324144421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121324144441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60662072210 + 60662072211.

It is an arithmetic number, because the mean of its divisors is an integer number (60662072211).

Almost surely, 2^121324144421 is an apocalyptic number.

It is an amenable number.

121324144421 is a deficient number, since it is larger than the sum of its proper divisors (1).

121324144421 is an equidigital number, since it uses as much as digits as its factorization.

121324144421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 29.

Adding to 121324144421 its reverse (124441423121), we get a palindrome (245765567542).

The spelling of 121324144421 in words is "one hundred twenty-one billion, three hundred twenty-four million, one hundred forty-four thousand, four hundred twenty-one".