121154432313247 has 2 divisors, whose sum is σ = 121154432313248. Its totient is φ = 121154432313246.

The previous prime is 121154432313203. The next prime is 121154432313253. The reversal of 121154432313247 is 742313234451121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121154432313247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121154432313647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60577216156623 + 60577216156624.

It is an arithmetic number, because the mean of its divisors is an integer number (60577216156624).

Almost surely, 2^{121154432313247} is an apocalyptic number.

121154432313247 is a deficient number, since it is larger than the sum of its proper divisors (1).

121154432313247 is an equidigital number, since it uses as much as digits as its factorization.

121154432313247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

Adding to 121154432313247 its reverse (742313234451121), we get a palindrome (863467666764368).

The spelling of 121154432313247 in words is "one hundred twenty-one trillion, one hundred fifty-four billion, four hundred thirty-two million, three hundred thirteen thousand, two hundred forty-seven".