161211113 has 8 divisors (see below), whose sum is σ = 186574080. Its totient is φ = 136431360.

The previous prime is 161211103. The next prime is 161211121. The reversal of 161211113 is 311112161.

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 161211113 - 2⁸ = 161210857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161211091 and 161211100.

It is not an unprimeable number, because it can be changed into a prime (161211103) 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, 145208 + ... + 146313.

It is an arithmetic number, because the mean of its divisors is an integer number (23321760).

Almost surely, 2^161211113 is an apocalyptic number.

It is an amenable number.

161211113 is a deficient number, since it is larger than the sum of its proper divisors (25362967).

161211113 is an equidigital number, since it uses as much as digits as its factorization.

161211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291607.

The product of its digits is 36, while the sum is 17.

The square root of 161211113 is about 12696.8938327451. The cubic root of 161211113 is about 544.2498593155.

Adding to 161211113 its reverse (311112161), we get a palindrome (472323274).

The spelling of 161211113 in words is "one hundred sixty-one million, two hundred eleven thousand, one hundred thirteen".