1442321101221 has 64 divisors (see below), whose sum is σ = 2603397328896. Its totient is φ = 691622331840.

The previous prime is 1442321101159. The next prime is 1442321101279. The reversal of 1442321101221 is 1221011232441.

It is not a de Polignac number, because 1442321101221 - 2¹⁰ = 1442321100197 is a prime.

It is a super-4 number, since 4×1442321101221⁴ (a number of 50 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1442321101191 and 1442321101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442321101621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1621321 + ... + 2348046.

It is an arithmetic number, because the mean of its divisors is an integer number (40678083264).

Almost surely, 2^{1442321101221} is an apocalyptic number.

1442321101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1442321101221 is a deficient number, since it is larger than the sum of its proper divisors (1161076227675).

1442321101221 is a wasteful number, since it uses less digits than its factorization.

1442321101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969423 (or 3969401 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1442321101221 its reverse (1221011232441), we get a palindrome (2663332333662).

The spelling of 1442321101221 in words is "one trillion, four hundred forty-two billion, three hundred twenty-one million, one hundred one thousand, two hundred twenty-one".