1201200221 has 4 divisors (see below), whose sum is σ = 1293600252. Its totient is φ = 1108800192.

The previous prime is 1201200199. The next prime is 1201200233. The reversal of 1201200221 is 1220021021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220021021 = 16921 ⋅72101.

It can be written as a sum of positive squares in 2 ways, for example, as 538704100 + 662496121 = 23210^2 + 25739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201200221 - 2⁶ = 1201200157 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 (1201200241) 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, 46199996 + ... + 46200021.

It is an arithmetic number, because the mean of its divisors is an integer number (323400063).

Almost surely, 2^1201200221 is an apocalyptic number.

It is an amenable number.

1201200221 is a deficient number, since it is larger than the sum of its proper divisors (92400031).

1201200221 is an equidigital number, since it uses as much as digits as its factorization.

1201200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92400030.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1201200221 is about 34658.3355197563. The cubic root of 1201200221 is about 1063.0127358900.

Adding to 1201200221 its reverse (1220021021), we get a palindrome (2421221242).

The spelling of 1201200221 in words is "one billion, two hundred one million, two hundred thousand, two hundred twenty-one".