321203100000421 has 4 divisors (see below), whose sum is σ = 321203783563200. Its totient is φ = 321202416437644.

The previous prime is 321203100000311. The next prime is 321203100000463. The reversal of 321203100000421 is 124000001302123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321203100000421 - 2⁹ = 321203099999909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321203100000481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341076061 + ... + 342016498.

It is an arithmetic number, because the mean of its divisors is an integer number (80300945890800).

Almost surely, 2^{321203100000421} is an apocalyptic number.

It is an amenable number.

321203100000421 is a deficient number, since it is larger than the sum of its proper divisors (683562779).

321203100000421 is an equidigital number, since it uses as much as digits as its factorization.

321203100000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683562778.

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

Adding to 321203100000421 its reverse (124000001302123), we get a palindrome (445203101302544).

The spelling of 321203100000421 in words is "three hundred twenty-one trillion, two hundred three billion, one hundred million, four hundred twenty-one", and thus it is an aban number.