1201201221 has 8 divisors (see below), whose sum is σ = 1747201824. Its totient is φ = 728000720.

The previous prime is 1201201201. The next prime is 1201201229. The reversal of 1201201221 is 1221021021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201201221 - 2⁷ = 1201201093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201201197 and 1201201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18199986 + ... + 18200051.

It is an arithmetic number, because the mean of its divisors is an integer number (218400228).

Almost surely, 2^1201201221 is an apocalyptic number.

1201201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201201221 is a deficient number, since it is larger than the sum of its proper divisors (546000603).

1201201221 is a wasteful number, since it uses less digits than its factorization.

1201201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36400051.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1201201221 is about 34658.3499462972. The cubic root of 1201201221 is about 1063.0130308762.

Adding to 1201201221 its reverse (1221021021), we get a palindrome (2422222242).

It can be divided in two parts, 12012012 and 21, that multiplied together give a palindrome (252252252).

The spelling of 1201201221 in words is "one billion, two hundred one million, two hundred one thousand, two hundred twenty-one".