321220001144421 has 16 divisors (see below), whose sum is σ = 476530707603520. Its totient is φ = 213854516437680.

The previous prime is 321220001144407. The next prime is 321220001144423. The reversal of 321220001144421 is 124441100022123.

321220001144421 is a `hidden beast` number, since 3 + 2 + 1 + 2 + 200 + 0 + 1 + 14 + 442 + 1 = 666.

It is not a de Polignac number, because 321220001144421 - 2⁵ = 321220001144389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321220001144423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8115285175 + ... + 8115324756.

It is an arithmetic number, because the mean of its divisors is an integer number (29783169225220).

Almost surely, 2^{321220001144421} is an apocalyptic number.

It is an amenable number.

321220001144421 is a deficient number, since it is larger than the sum of its proper divisors (155310706459099).

321220001144421 is a wasteful number, since it uses less digits than its factorization.

321220001144421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16230610673 (or 16230610667 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 321220001144421 its reverse (124441100022123), we get a palindrome (445661101166544).

The spelling of 321220001144421 in words is "three hundred twenty-one trillion, two hundred twenty billion, one million, one hundred forty-four thousand, four hundred twenty-one".