1055155121 has 2 divisors, whose sum is σ = 1055155122. Its totient is φ = 1055155120.

The previous prime is 1055155103. The next prime is 1055155163. The reversal of 1055155121 is 1215515501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693584896 + 361570225 = 26336^2 + 19015^2 .

It is an emirp because it is prime and its reverse (1215515501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1055155121 - 2¹⁴ = 1055138737 is a prime.

It is a super-2 number, since 2×1055155121² = 2226704658745049282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1055155021) 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 as a sum of consecutive naturals, namely, 527577560 + 527577561.

It is an arithmetic number, because the mean of its divisors is an integer number (527577561).

Almost surely, 2^1055155121 is an apocalyptic number.

It is an amenable number.

1055155121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055155121 is an equidigital number, since it uses as much as digits as its factorization.

1055155121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 26.

The square root of 1055155121 is about 32483.1513403487. The cubic root of 1055155121 is about 1018.0570217647.

The spelling of 1055155121 in words is "one billion, fifty-five million, one hundred fifty-five thousand, one hundred twenty-one".