121241243413 has 2 divisors, whose sum is σ = 121241243414. Its totient is φ = 121241243412.

The previous prime is 121241243353. The next prime is 121241243441. The reversal of 121241243413 is 314342142121.

It is a happy number.

It is an a-pointer prime, because the next prime (121241243441) can be obtained adding 121241243413 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120497154129 + 744089284 = 347127^2 + 27278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121241243413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121241241413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60620621706 + 60620621707.

It is an arithmetic number, because the mean of its divisors is an integer number (60620621707).

Almost surely, 2^121241243413 is an apocalyptic number.

It is an amenable number.

121241243413 is a deficient number, since it is larger than the sum of its proper divisors (1).

121241243413 is an equidigital number, since it uses as much as digits as its factorization.

121241243413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

Adding to 121241243413 its reverse (314342142121), we get a palindrome (435583385534).

The spelling of 121241243413 in words is "one hundred twenty-one billion, two hundred forty-one million, two hundred forty-three thousand, four hundred thirteen".