1351220105 has 4 divisors (see below), whose sum is σ = 1621464132. Its totient is φ = 1080976080.

The previous prime is 1351220083. The next prime is 1351220153. The reversal of 1351220105 is 5010221531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159037321 + 1192182784 = 12611^2 + 34528^2 .

It is not a de Polignac number, because 1351220105 - 2⁶ = 1351220041 is a prime.

It is a super-2 number, since 2×1351220105² = 3651591544312422050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135122006 + ... + 135122015.

It is an arithmetic number, because the mean of its divisors is an integer number (405366033).

Almost surely, 2^1351220105 is an apocalyptic number.

It is an amenable number.

1351220105 is a deficient number, since it is larger than the sum of its proper divisors (270244027).

1351220105 is an equidigital number, since it uses as much as digits as its factorization.

1351220105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270244026.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1351220105 is about 36758.9459179667. The cubic root of 1351220105 is about 1105.5423052805.

Adding to 1351220105 its reverse (5010221531), we get a palindrome (6361441636).

The spelling of 1351220105 in words is "one billion, three hundred fifty-one million, two hundred twenty thousand, one hundred five".