1070165221 has 4 divisors (see below), whose sum is σ = 1107067500. Its totient is φ = 1033262944.

The previous prime is 1070165191. The next prime is 1070165227. The reversal of 1070165221 is 1225610701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1225610701 = 7 ⋅175087243.

It can be written as a sum of positive squares in 2 ways, for example, as 839550625 + 230614596 = 28975^2 + 15186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1070165221 - 2⁵ = 1070165189 is a prime.

It is a super-2 number, since 2×1070165221² = 2290507200475957682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1070165227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18451096 + ... + 18451153.

It is an arithmetic number, because the mean of its divisors is an integer number (276766875).

Almost surely, 2^1070165221 is an apocalyptic number.

It is an amenable number.

1070165221 is a deficient number, since it is larger than the sum of its proper divisors (36902279).

1070165221 is an equidigital number, since it uses as much as digits as its factorization.

1070165221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36902278.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1070165221 is about 32713.3798467844. The cubic root of 1070165221 is about 1022.8617637786.

Adding to 1070165221 its reverse (1225610701), we get a palindrome (2295775922).

The spelling of 1070165221 in words is "one billion, seventy million, one hundred sixty-five thousand, two hundred twenty-one".