123020351321 has 12 divisors (see below), whose sum is σ = 146973278592. Its totient is φ = 100861403016.

The previous prime is 123020351317. The next prime is 123020351341. The reversal of 123020351321 is 123153020321.

It is not a de Polignac number, because 123020351321 - 2² = 123020351317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123020351341) 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 11 ways as a sum of consecutive naturals, for example, 16607201 + ... + 16614606.

It is an arithmetic number, because the mean of its divisors is an integer number (12247773216).

Almost surely, 2^123020351321 is an apocalyptic number.

It is an amenable number.

123020351321 is a deficient number, since it is larger than the sum of its proper divisors (23952927271).

123020351321 is an equidigital number, since it uses as much as digits as its factorization.

123020351321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33221860 (or 33221837 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 123020351321 its reverse (123153020321), we get a palindrome (246173371642).

The spelling of 123020351321 in words is "one hundred twenty-three billion, twenty million, three hundred fifty-one thousand, three hundred twenty-one".