1200324421 has 4 divisors (see below), whose sum is σ = 1202197644. Its totient is φ = 1198451200.

The previous prime is 1200324409. The next prime is 1200324427. The reversal of 1200324421 is 1244230021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1244230021 = 349 ⋅3565129.

It can be written as a sum of positive squares in 2 ways, for example, as 1032336900 + 167987521 = 32130^2 + 12961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200324421 - 2⁹ = 1200323909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200324427) 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, 935650 + ... + 936931.

It is an arithmetic number, because the mean of its divisors is an integer number (300549411).

Almost surely, 2^1200324421 is an apocalyptic number.

It is an amenable number.

1200324421 is a deficient number, since it is larger than the sum of its proper divisors (1873223).

1200324421 is an equidigital number, since it uses as much as digits as its factorization.

1200324421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873222.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1200324421 is about 34645.6984487252. The cubic root of 1200324421 is about 1062.7543240972.

Adding to 1200324421 its reverse (1244230021), we get a palindrome (2444554442).

The spelling of 1200324421 in words is "one billion, two hundred million, three hundred twenty-four thousand, four hundred twenty-one".