1072112161 has 4 divisors (see below), whose sum is σ = 1072197424. Its totient is φ = 1072026900.

The previous prime is 1072112131. The next prime is 1072112201. The reversal of 1072112161 is 1612112701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1072112161 - 2²⁹ = 535241249 is a prime.

It is a super-2 number, since 2×1072112161² = 2298848971528179842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072112131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19635 + ... + 50296.

It is an arithmetic number, because the mean of its divisors is an integer number (268049356).

Almost surely, 2^1072112161 is an apocalyptic number.

It is an amenable number.

1072112161 is a deficient number, since it is larger than the sum of its proper divisors (85263).

1072112161 is an equidigital number, since it uses as much as digits as its factorization.

1072112161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85262.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 1072112161 is about 32743.1238735708. The cubic root of 1072112161 is about 1023.4816817712.

Adding to 1072112161 its reverse (1612112701), we get a palindrome (2684224862).

The spelling of 1072112161 in words is "one billion, seventy-two million, one hundred twelve thousand, one hundred sixty-one".