321120021403 has 16 divisors (see below), whose sum is σ = 337815072000. Its totient is φ = 304660328544.

The previous prime is 321120021401. The next prime is 321120021427. The reversal of 321120021403 is 304120021123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321120021403 - 2¹ = 321120021401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321120021401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1784925 + ... + 1956577.

It is an arithmetic number, because the mean of its divisors is an integer number (21113442000).

Almost surely, 2^321120021403 is an apocalyptic number.

321120021403 is a deficient number, since it is larger than the sum of its proper divisors (16695050597).

321120021403 is a wasteful number, since it uses less digits than its factorization.

321120021403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172338.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 321120021403 its reverse (304120021123), we get a palindrome (625240042526).

The spelling of 321120021403 in words is "three hundred twenty-one billion, one hundred twenty million, twenty-one thousand, four hundred three".