1302223221 has 24 divisors (see below), whose sum is σ = 2095537080. Its totient is φ = 773732736.

The previous prime is 1302223217. The next prime is 1302223229. The reversal of 1302223221 is 1223222031.

It can be written as a sum of positive squares in 4 ways, for example, as 93896100 + 1208327121 = 9690^2 + 34761^2 .

It is not a de Polignac number, because 1302223221 - 2² = 1302223217 is a prime.

It is a super-2 number, since 2×1302223221² = 3391570634623229682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1302223194 and 1302223203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302223229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188506 + ... + 195291.

It is an arithmetic number, because the mean of its divisors is an integer number (87314045).

Almost surely, 2^1302223221 is an apocalyptic number.

It is an amenable number.

1302223221 is a deficient number, since it is larger than the sum of its proper divisors (793313859).

1302223221 is a wasteful number, since it uses less digits than its factorization.

1302223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383845 (or 383842 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1302223221 is about 36086.3301126618. The cubic root of 1302223221 is about 1092.0146845226.

Adding to 1302223221 its reverse (1223222031), we get a palindrome (2525445252).

The spelling of 1302223221 in words is "one billion, three hundred two million, two hundred twenty-three thousand, two hundred twenty-one".