121123266631399 has 2 divisors, whose sum is σ = 121123266631400. Its totient is φ = 121123266631398.

The previous prime is 121123266631357. The next prime is 121123266631483. The reversal of 121123266631399 is 993136662321121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121123266631399 - 2¹³ = 121123266623207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121123266632399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561633315699 + 60561633315700.

It is an arithmetic number, because the mean of its divisors is an integer number (60561633315700).

Almost surely, 2^{121123266631399} is an apocalyptic number.

121123266631399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121123266631399 is an equidigital number, since it uses as much as digits as its factorization.

121123266631399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 55.

The spelling of 121123266631399 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, two hundred sixty-six million, six hundred thirty-one thousand, three hundred ninety-nine".