100161213 has 4 divisors (see below), whose sum is σ = 133548288. Its totient is φ = 66774140.

The previous prime is 100161209. The next prime is 100161221. The reversal of 100161213 is 312161001.

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 an emirpimes, since its reverse is a distinct semiprime: 312161001 = 3 ⋅104053667.

It is a cyclic number.

It is not a de Polignac number, because 100161213 - 2² = 100161209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100161192 and 100161201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100161613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16693533 + ... + 16693538.

It is an arithmetic number, because the mean of its divisors is an integer number (33387072).

Almost surely, 2^100161213 is an apocalyptic number.

It is an amenable number.

100161213 is a deficient number, since it is larger than the sum of its proper divisors (33387075).

100161213 is an equidigital number, since it uses as much as digits as its factorization.

100161213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33387074.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 100161213 is about 10008.0574039121. The cubic root of 100161213 is about 464.4081775979.

The spelling of 100161213 in words is "one hundred million, one hundred sixty-one thousand, two hundred thirteen".