11221451660 has 24 divisors (see below), whose sum is σ = 23785287120. Its totient is φ = 4446630464.

The previous prime is 11221451627. The next prime is 11221451671. The reversal of 11221451660 is 6615412211.

11221451660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2619695 + ... + 2623974.

It is an arithmetic number, because the mean of its divisors is an integer number (991053630).

Almost surely, 2^11221451660 is an apocalyptic number.

11221451660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221451660 is an abundant number, since it is smaller than the sum of its proper divisors (12563835460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221451660 is a wasteful number, since it uses less digits than its factorization.

11221451660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243785 (or 5243783 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 11221451660 its reverse (6615412211), we get a palindrome (17836863871).

The spelling of 11221451660 in words is "eleven billion, two hundred twenty-one million, four hundred fifty-one thousand, six hundred sixty".