1051216109 has 2 divisors, whose sum is σ = 1051216110. Its totient is φ = 1051216108.

The previous prime is 1051216087. The next prime is 1051216163. The reversal of 1051216109 is 9016121501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014613609 + 36602500 = 31853^2 + 6050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051216109 - 2²⁴ = 1034438893 is a prime.

It is a super-2 number, since 2×1051216109² = 2210110615642199762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051216189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525608054 + 525608055.

It is an arithmetic number, because the mean of its divisors is an integer number (525608055).

Almost surely, 2^1051216109 is an apocalyptic number.

It is an amenable number.

1051216109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051216109 is an equidigital number, since it uses as much as digits as its factorization.

1051216109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 26.

The square root of 1051216109 is about 32422.4630310530. The cubic root of 1051216109 is about 1016.7886018520.

The spelling of 1051216109 in words is "one billion, fifty-one million, two hundred sixteen thousand, one hundred nine".