1201443221 has 4 divisors (see below), whose sum is σ = 1310665344. Its totient is φ = 1092221100.

The previous prime is 1201443211. The next prime is 1201443239. The reversal of 1201443221 is 1223441021.

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.

It is a cyclic number.

It is not a de Polignac number, because 1201443221 - 2¹⁰ = 1201442197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201443193 and 1201443202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201443211) 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, 54611045 + ... + 54611066.

It is an arithmetic number, because the mean of its divisors is an integer number (327666336).

Almost surely, 2^1201443221 is an apocalyptic number.

1201443221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201443221 is a deficient number, since it is larger than the sum of its proper divisors (109222123).

1201443221 is a wasteful number, since it uses less digits than its factorization.

1201443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109222122.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1201443221 is about 34661.8409926536. The cubic root of 1201443221 is about 1063.0844127217.

Adding to 1201443221 its reverse (1223441021), we get a palindrome (2424884242).

The spelling of 1201443221 in words is "one billion, two hundred one million, four hundred forty-three thousand, two hundred twenty-one".