123121312302 has 16 divisors (see below), whose sum is σ = 246692800512. Its totient is φ = 40965408120.

The previous prime is 123121312271. The next prime is 123121312339. The reversal of 123121312302 is 203213121321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18753774 + ... + 18760337.

It is an arithmetic number, because the mean of its divisors is an integer number (15418300032).

Almost surely, 2^123121312302 is an apocalyptic number.

123121312302 is an abundant number, since it is smaller than the sum of its proper divisors (123571488210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123121312302 is a wasteful number, since it uses less digits than its factorization.

123121312302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37514663.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123121312302 its reverse (203213121321), we get a palindrome (326334433623).

The spelling of 123121312302 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred twelve thousand, three hundred two".