1205502221 has 8 divisors (see below), whose sum is σ = 1502963904. Its totient is φ = 939352320.

The previous prime is 1205502211. The next prime is 1205502223. The reversal of 1205502221 is 1222055021.

It is a happy number.

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-1205502221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1205502193 and 1205502202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205502223) 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, 7827860 + ... + 7828013.

It is an arithmetic number, because the mean of its divisors is an integer number (187870488).

Almost surely, 2^1205502221 is an apocalyptic number.

1205502221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1205502221 is a deficient number, since it is larger than the sum of its proper divisors (297461683).

1205502221 is a wasteful number, since it uses less digits than its factorization.

1205502221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15655891.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1205502221 is about 34720.3430426602. The cubic root of 1205502221 is about 1064.2802548751.

Adding to 1205502221 its reverse (1222055021), we get a palindrome (2427557242).

The spelling of 1205502221 in words is "one billion, two hundred five million, five hundred two thousand, two hundred twenty-one".