321103132311221 has 4 divisors (see below), whose sum is σ = 345803373258252. Its totient is φ = 296402891364192.

The previous prime is 321103132311179. The next prime is 321103132311287. The reversal of 321103132311221 is 122113231301123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39009642892900 + 282093489418321 = 6245770^2 + 16795639^2 .

It is a cyclic number.

It is not a de Polignac number, because 321103132311221 - 2²² = 321103128116917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321103132311821) 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, 12350120473496 + ... + 12350120473521.

It is an arithmetic number, because the mean of its divisors is an integer number (86450843314563).

Almost surely, 2^{321103132311221} is an apocalyptic number.

It is an amenable number.

321103132311221 is a deficient number, since it is larger than the sum of its proper divisors (24700240947031).

321103132311221 is a wasteful number, since it uses less digits than its factorization.

321103132311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24700240947030.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 321103132311221 its reverse (122113231301123), we get a palindrome (443216363612344).

The spelling of 321103132311221 in words is "three hundred twenty-one trillion, one hundred three billion, one hundred thirty-two million, three hundred eleven thousand, two hundred twenty-one".