1201217221 has 8 divisors (see below), whose sum is σ = 1295280000. Its totient is φ = 1110238560.

The previous prime is 1201217191. The next prime is 1201217249. The reversal of 1201217221 is 1227121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201217221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201217921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770221 + ... + 771778.

It is an arithmetic number, because the mean of its divisors is an integer number (161910000).

Almost surely, 2^1201217221 is an apocalyptic number.

It is an amenable number.

1201217221 is a deficient number, since it is larger than the sum of its proper divisors (94062779).

1201217221 is a wasteful number, since it uses less digits than its factorization.

1201217221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542059.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1201217221 is about 34658.5807701354. The cubic root of 1201217221 is about 1063.0177506330.

Adding to 1201217221 its reverse (1227121021), we get a palindrome (2428338242).

The spelling of 1201217221 in words is "one billion, two hundred one million, two hundred seventeen thousand, two hundred twenty-one".