11353252221 has 8 divisors (see below), whose sum is σ = 16819632960. Its totient is φ = 7568834796.

The previous prime is 11353252181. The next prime is 11353252237. The reversal of 11353252221 is 12225235311.

11353252221 is a `hidden beast` number, since 1 + 135 + 3 + 2 + 522 + 2 + 1 = 666.

It is not a de Polignac number, because 11353252221 - 2⁷ = 11353252093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 420490823 = 11353252221 / (1 + 1 + 3 + 5 + 3 + 2 + 5 + 2 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11353252291) 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, 210245385 + ... + 210245438.

It is an arithmetic number, because the mean of its divisors is an integer number (2102454120).

Almost surely, 2^11353252221 is an apocalyptic number.

It is an amenable number.

11353252221 is a deficient number, since it is larger than the sum of its proper divisors (5466380739).

11353252221 is an equidigital number, since it uses as much as digits as its factorization.

11353252221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420490832 (or 420490826 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

Adding to 11353252221 its reverse (12225235311), we get a palindrome (23578487532).

The spelling of 11353252221 in words is "eleven billion, three hundred fifty-three million, two hundred fifty-two thousand, two hundred twenty-one".