1322221021 has 8 divisors (see below), whose sum is σ = 1488953088. Its totient is φ = 1163244000.

The previous prime is 1322221009. The next prime is 1322221057. The reversal of 1322221021 is 1201222231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1322221021 - 2⁵ = 1322220989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1322220986 and 1322221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322221721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1938400 + ... + 1939081.

It is an arithmetic number, because the mean of its divisors is an integer number (186119136).

Almost surely, 2^1322221021 is an apocalyptic number.

1322221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1322221021 is a deficient number, since it is larger than the sum of its proper divisors (166732067).

1322221021 is a wasteful number, since it uses less digits than its factorization.

1322221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877523.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1322221021 is about 36362.3571980695. The cubic root of 1322221021 is about 1097.5762117260.

Adding to 1322221021 its reverse (1201222231), we get a palindrome (2523443252).

It can be divided in two parts, 13222210 and 21, that added together give a palindrome (13222231).

The spelling of 1322221021 in words is "one billion, three hundred twenty-two million, two hundred twenty-one thousand, twenty-one".