1302001221 has 16 divisors (see below), whose sum is σ = 1756188224. Its totient is φ = 857931264.

The previous prime is 1302001199. The next prime is 1302001241. The reversal of 1302001221 is 1221002031.

It is not a de Polignac number, because 1302001221 - 2⁷ = 1302001093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1302001197 and 1302001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302001241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261471 + ... + 266403.

It is an arithmetic number, because the mean of its divisors is an integer number (109761764).

Almost surely, 2^1302001221 is an apocalyptic number.

It is an amenable number.

1302001221 is a deficient number, since it is larger than the sum of its proper divisors (454187003).

1302001221 is an equidigital number, since it uses as much as digits as its factorization.

1302001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1302001221 is about 36083.2540245472. The cubic root of 1302001221 is about 1091.9526262841.

Adding to 1302001221 its reverse (1221002031), we get a palindrome (2523003252).

The spelling of 1302001221 in words is "one billion, three hundred two million, one thousand, two hundred twenty-one".