361291121 has 4 divisors (see below), whose sum is σ = 361330032. Its totient is φ = 361252212.

The previous prime is 361291109. The next prime is 361291181. The reversal of 361291121 is 121192163.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121192163 = 127 ⋅954269.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361291121 is a prime.

It is a super-2 number, since 2×361291121² = 261062548226873282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361291181) 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, 3506 + ... + 27108.

It is an arithmetic number, because the mean of its divisors is an integer number (90332508).

Almost surely, 2^361291121 is an apocalyptic number.

It is an amenable number.

361291121 is a deficient number, since it is larger than the sum of its proper divisors (38911).

361291121 is a wasteful number, since it uses less digits than its factorization.

361291121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38910.

The product of its digits is 648, while the sum is 26.

The square root of 361291121 is about 19007.6595350401. The cubic root of 361291121 is about 712.2280869061.

The spelling of 361291121 in words is "three hundred sixty-one million, two hundred ninety-one thousand, one hundred twenty-one".