121313403231423 has 16 divisors (see below), whose sum is σ = 174197493751680. Its totient is φ = 74652735226464.

The previous prime is 121313403231421. The next prime is 121313403231451. The reversal of 121313403231423 is 324132304313121.

It is not a de Polignac number, because 121313403231423 - 2¹ = 121313403231421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313403231421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32953861 + ... + 36449742.

It is an arithmetic number, because the mean of its divisors is an integer number (10887343359480).

Almost surely, 2^{121313403231423} is an apocalyptic number.

121313403231423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121313403231423 is a deficient number, since it is larger than the sum of its proper divisors (52884090520257).

121313403231423 is a wasteful number, since it uses less digits than its factorization.

121313403231423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69448438.

The product of its (nonzero) digits is 31104, while the sum is 33.

Adding to 121313403231423 its reverse (324132304313121), we get a palindrome (445445707544544).

The spelling of 121313403231423 in words is "one hundred twenty-one trillion, three hundred thirteen billion, four hundred three million, two hundred thirty-one thousand, four hundred twenty-three".