321221112212021 has 8 divisors (see below), whose sum is σ = 367363546646400. Its totient is φ = 275142103807248.

The previous prime is 321221112212009. The next prime is 321221112212027. The reversal of 321221112212021 is 120212211122123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321221112212021 - 2¹⁰ = 321221112210997 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 (321221112212027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15856496546 + ... + 15856516803.

It is an arithmetic number, because the mean of its divisors is an integer number (45920443330800).

Almost surely, 2^{321221112212021} is an apocalyptic number.

It is an amenable number.

321221112212021 is a deficient number, since it is larger than the sum of its proper divisors (46142434434379).

321221112212021 is a wasteful number, since it uses less digits than its factorization.

321221112212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31713014803.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 321221112212021 its reverse (120212211122123), we get a palindrome (441433323334144).

The spelling of 321221112212021 in words is "three hundred twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, twenty-one".