1302021229 has 2 divisors, whose sum is σ = 1302021230. Its totient is φ = 1302021228.

The previous prime is 1302021221. The next prime is 1302021233. The reversal of 1302021229 is 9221202031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 902101225 + 399920004 = 30035^2 + 19998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302021229 - 2³ = 1302021221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1302021221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651010614 + 651010615.

It is an arithmetic number, because the mean of its divisors is an integer number (651010615).

Almost surely, 2^1302021229 is an apocalyptic number.

It is an amenable number.

1302021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302021229 is an equidigital number, since it uses as much as digits as its factorization.

1302021229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1302021229 is about 36083.5312712046. The cubic root of 1302021229 is about 1091.9582196420.

The spelling of 1302021229 in words is "one billion, three hundred two million, twenty-one thousand, two hundred twenty-nine".