366213121 has 4 divisors (see below), whose sum is σ = 369988612. Its totient is φ = 362437632.

The previous prime is 366213119. The next prime is 366213139. The reversal of 366213121 is 121312663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 304118721 + 62094400 = 17439^2 + 7880^2 .

It is a cyclic number.

It is not a de Polignac number, because 366213121 - 2¹ = 366213119 is a prime.

It is a super-2 number, since 2×366213121² = 268224099985121282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (366213151) 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, 1887600 + ... + 1887793.

It is an arithmetic number, because the mean of its divisors is an integer number (92497153).

Almost surely, 2^366213121 is an apocalyptic number.

It is an amenable number.

366213121 is a deficient number, since it is larger than the sum of its proper divisors (3775491).

366213121 is an equidigital number, since it uses as much as digits as its factorization.

366213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775490.

The product of its digits is 1296, while the sum is 25.

The square root of 366213121 is about 19136.6956656576. The cubic root of 366213121 is about 715.4478235214.

Adding to 366213121 its reverse (121312663), we get a palindrome (487525784).

The spelling of 366213121 in words is "three hundred sixty-six million, two hundred thirteen thousand, one hundred twenty-one".