1221140339 has 2 divisors, whose sum is σ = 1221140340. Its totient is φ = 1221140338.

The previous prime is 1221140303. The next prime is 1221140411. The reversal of 1221140339 is 9330411221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221140339 - 2⁸ = 1221140083 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1221148339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610570169 + 610570170.

It is an arithmetic number, because the mean of its divisors is an integer number (610570170).

Almost surely, 2^1221140339 is an apocalyptic number.

1221140339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221140339 is an equidigital number, since it uses as much as digits as its factorization.

1221140339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1221140339 is about 34944.8184857212. The cubic root of 1221140339 is about 1068.8625461816.

The spelling of 1221140339 in words is "one billion, two hundred twenty-one million, one hundred forty thousand, three hundred thirty-nine".