1022201321 has 4 divisors (see below), whose sum is σ = 1022392644. Its totient is φ = 1022010000.

The previous prime is 1022201317. The next prime is 1022201333. The reversal of 1022201321 is 1231022201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1231022201 = 179 ⋅6877219.

It can be written as a sum of positive squares in 2 ways, for example, as 885895696 + 136305625 = 29764^2 + 11675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022201321 - 2² = 1022201317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022201296 and 1022201305.

It is not an unprimeable number, because it can be changed into a prime (1022201371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87410 + ... + 98411.

It is an arithmetic number, because the mean of its divisors is an integer number (255598161).

Almost surely, 2^1022201321 is an apocalyptic number.

It is an amenable number.

1022201321 is a deficient number, since it is larger than the sum of its proper divisors (191323).

1022201321 is an equidigital number, since it uses as much as digits as its factorization.

1022201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191322.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1022201321 is about 31971.8832882894. The cubic root of 1022201321 is about 1007.3463394722.

Adding to 1022201321 its reverse (1231022201), we get a palindrome (2253223522).

The spelling of 1022201321 in words is "one billion, twenty-two million, two hundred one thousand, three hundred twenty-one".