1055105221 has 8 divisors (see below), whose sum is σ = 1121122944. Its totient is φ = 989526720.

The previous prime is 1055105189. The next prime is 1055105237. The reversal of 1055105221 is 1225015501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1055105221 - 2⁵ = 1055105189 is a prime.

It is a super-2 number, since 2×1055105221² = 2226494054762917682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1055105192 and 1055105201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055105251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104845 + ... + 114466.

It is an arithmetic number, because the mean of its divisors is an integer number (140140368).

Almost surely, 2^1055105221 is an apocalyptic number.

It is an amenable number.

1055105221 is a deficient number, since it is larger than the sum of its proper divisors (66017723).

1055105221 is a wasteful number, since it uses less digits than its factorization.

1055105221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219611.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1055105221 is about 32482.3832407661. The cubic root of 1055105221 is about 1018.0409729882.

It can be divided in two parts, 1055 and 105221, that added together give a square (106276 = 326²).

The spelling of 1055105221 in words is "one billion, fifty-five million, one hundred five thousand, two hundred twenty-one".