321203403020421 has 12 divisors (see below), whose sum is σ = 466389583445760. Its totient is φ = 213014473206120.

The previous prime is 321203403020411. The next prime is 321203403020429. The reversal of 321203403020421 is 124020304302123.

321203403020421 is a `hidden beast` number, since 3 + 2 + 1 + 203 + 4 + 0 + 30 + 2 + 0 + 421 = 666.

It is not a de Polignac number, because 321203403020421 - 2¹⁷ = 321203402889349 is a prime.

It is a super-2 number, since 2×321203403020421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321203403020429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93427398811 + ... + 93427402248.

It is an arithmetic number, because the mean of its divisors is an integer number (38865798620480).

Almost surely, 2^{321203403020421} is an apocalyptic number.

It is an amenable number.

321203403020421 is a deficient number, since it is larger than the sum of its proper divisors (145186180425339).

321203403020421 is a wasteful number, since it uses less digits than its factorization.

321203403020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186854801256 (or 186854801253 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 321203403020421 its reverse (124020304302123), we get a palindrome (445223707322544).

The spelling of 321203403020421 in words is "three hundred twenty-one trillion, two hundred three billion, four hundred three million, twenty thousand, four hundred twenty-one".