1321021022 has 4 divisors (see below), whose sum is σ = 1981531536. Its totient is φ = 660510510.

The previous prime is 1321021007. The next prime is 1321021069. The reversal of 1321021022 is 2201201231.

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: 2201201231 = 467 ⋅4713493.

It is a junction number, because it is equal to n+sod(n) for n = 1321020988 and 1321021006.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 330255254 + ... + 330255257.

It is an arithmetic number, because the mean of its divisors is an integer number (495382884).

Almost surely, 2^1321021022 is an apocalyptic number.

1321021022 is a deficient number, since it is larger than the sum of its proper divisors (660510514).

1321021022 is an equidigital number, since it uses as much as digits as its factorization.

1321021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660510513.

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

The square root of 1321021022 is about 36345.8528858521. The cubic root of 1321021022 is about 1097.2440713390.

Adding to 1321021022 its reverse (2201201231), we get a palindrome (3522222253).

The spelling of 1321021022 in words is "one billion, three hundred twenty-one million, twenty-one thousand, twenty-two".