1071213181 has 2 divisors, whose sum is σ = 1071213182. Its totient is φ = 1071213180.

The previous prime is 1071213161. The next prime is 1071213193. The reversal of 1071213181 is 1813121701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572405625 + 498807556 = 23925^2 + 22334^2 .

It is an emirp because it is prime and its reverse (1813121701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1071213181 - 2¹⁵ = 1071180413 is a prime.

It is a super-2 number, since 2×1071213181² = 2294995358296277522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1071213161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535606590 + 535606591.

It is an arithmetic number, because the mean of its divisors is an integer number (535606591).

Almost surely, 2^1071213181 is an apocalyptic number.

It is an amenable number.

1071213181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071213181 is an equidigital number, since it uses as much as digits as its factorization.

1071213181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 25.

The square root of 1071213181 is about 32729.3932268840. The cubic root of 1071213181 is about 1023.1955342067.

Adding to 1071213181 its reverse (1813121701), we get a palindrome (2884334882).

The spelling of 1071213181 in words is "one billion, seventy-one million, two hundred thirteen thousand, one hundred eighty-one".