11602352551221 has 24 divisors (see below), whose sum is σ = 17131454980640. Its totient is φ = 7564639126176.

The previous prime is 11602352551217. The next prime is 11602352551249. The reversal of 11602352551221 is 12215525320611.

11602352551221 is a `hidden beast` number, since 1 + 1 + 6 + 0 + 2 + 3 + 525 + 5 + 122 + 1 = 666.

It is not a de Polignac number, because 11602352551221 - 2² = 11602352551217 is a prime.

It is a super-2 number, since 2×11602352551221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11602352551261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69128590 + ... + 69296223.

Almost surely, 2^{11602352551221} is an apocalyptic number.

It is an amenable number.

11602352551221 is a deficient number, since it is larger than the sum of its proper divisors (5529102429419).

11602352551221 is a wasteful number, since it uses less digits than its factorization.

11602352551221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138425025 (or 138425022 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 11602352551221 its reverse (12215525320611), we get a palindrome (23817877871832).

The spelling of 11602352551221 in words is "eleven trillion, six hundred two billion, three hundred fifty-two million, five hundred fifty-one thousand, two hundred twenty-one".