1221020341 has 8 divisors (see below), whose sum is σ = 1231796160. Its totient is φ = 1210273248.

The previous prime is 1221020329. The next prime is 1221020357. The reversal of 1221020341 is 1430201221.

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 1221020341 - 2⁹ = 1221019829 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 (1221020371) 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, 83145 + ... + 96721.

It is an arithmetic number, because the mean of its divisors is an integer number (153974520).

Almost surely, 2^1221020341 is an apocalyptic number.

It is an amenable number.

1221020341 is a deficient number, since it is larger than the sum of its proper divisors (10775819).

1221020341 is a wasteful number, since it uses less digits than its factorization.

1221020341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14363.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221020341 is about 34943.1014794051. The cubic root of 1221020341 is about 1068.8275336704.

Adding to 1221020341 its reverse (1430201221), we get a palindrome (2651221562).

The spelling of 1221020341 in words is "one billion, two hundred twenty-one million, twenty thousand, three hundred forty-one".