121031312031247 has 2 divisors, whose sum is σ = 121031312031248. Its totient is φ = 121031312031246.

The previous prime is 121031312031169. The next prime is 121031312031257. The reversal of 121031312031247 is 742130213130121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121031312031247 - 2²⁷ = 121031177813519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121031312031257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515656015623 + 60515656015624.

It is an arithmetic number, because the mean of its divisors is an integer number (60515656015624).

Almost surely, 2^{121031312031247} is an apocalyptic number.

121031312031247 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031312031247 is an equidigital number, since it uses as much as digits as its factorization.

121031312031247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 121031312031247 its reverse (742130213130121), we get a palindrome (863161525161368).

The spelling of 121031312031247 in words is "one hundred twenty-one trillion, thirty-one billion, three hundred twelve million, thirty-one thousand, two hundred forty-seven".