1221521533341 has 8 divisors (see below), whose sum is σ = 1628753767584. Its totient is φ = 814318494000.

The previous prime is 1221521533339. The next prime is 1221521533343. The reversal of 1221521533341 is 1433351251221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221521533339) and next prime (1221521533343).

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

It is not a de Polignac number, because 1221521533341 - 2¹ = 1221521533339 is a prime.

It is a super-2 number, since 2×1221521533341² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221521533343) 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, 7200910 + ... + 7368591.

It is an arithmetic number, because the mean of its divisors is an integer number (203594220948).

Almost surely, 2^{1221521533341} is an apocalyptic number.

It is an amenable number.

1221521533341 is a deficient number, since it is larger than the sum of its proper divisors (407232234243).

1221521533341 is a wasteful number, since it uses less digits than its factorization.

1221521533341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14597451.

The product of its digits is 21600, while the sum is 33.

Adding to 1221521533341 its reverse (1433351251221), we get a palindrome (2654872784562).

The spelling of 1221521533341 in words is "one trillion, two hundred twenty-one billion, five hundred twenty-one million, five hundred thirty-three thousand, three hundred forty-one".