321213404031421 has 32 divisors (see below), whose sum is σ = 364318580736000. Its totient is φ = 280562782152000.

The previous prime is 321213404031301. The next prime is 321213404031431. The reversal of 321213404031421 is 124130404312123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321213404031421 - 2¹⁷ = 321213403900349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213404031431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105760410 + ... + 108755188.

It is an arithmetic number, because the mean of its divisors is an integer number (11384955648000).

Almost surely, 2^{321213404031421} is an apocalyptic number.

321213404031421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

321213404031421 is a deficient number, since it is larger than the sum of its proper divisors (43105176704579).

321213404031421 is a wasteful number, since it uses less digits than its factorization.

321213404031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997081.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 321213404031421 its reverse (124130404312123), we get a palindrome (445343808343544).

The spelling of 321213404031421 in words is "three hundred twenty-one trillion, two hundred thirteen billion, four hundred four million, thirty-one thousand, four hundred twenty-one".