123121321402 has 8 divisors (see below), whose sum is σ = 184710952800. Its totient is φ = 61551003804.

The previous prime is 123121321391. The next prime is 123121321409. The reversal of 123121321402 is 204123121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (123121321409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812502 + ... + 4838017.

It is an arithmetic number, because the mean of its divisors is an integer number (23088869100).

Almost surely, 2^123121321402 is an apocalyptic number.

123121321402 is a deficient number, since it is larger than the sum of its proper divisors (61589631398).

123121321402 is an equidigital number, since it uses as much as digits as its factorization.

123121321402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9656900.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123121321402 its reverse (204123121321), we get a palindrome (327244442723).

The spelling of 123121321402 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, four hundred two".