11131221010 has 64 divisors (see below), whose sum is σ = 24674678784. Its totient is φ = 3520742400.

The previous prime is 11131220987. The next prime is 11131221037. The reversal of 11131221010 is 1012213111.

It is a happy number.

11131221010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (13).

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 31 ways as a sum of consecutive naturals, for example, 2355450 + ... + 2360170.

It is an arithmetic number, because the mean of its divisors is an integer number (385541856).

Almost surely, 2^11131221010 is an apocalyptic number.

11131221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11131221010 is an abundant number, since it is smaller than the sum of its proper divisors (13543457774).

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

11131221010 is a wasteful number, since it uses less digits than its factorization.

11131221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11131221010 its reverse (1012213111), we get a palindrome (12143434121).

The spelling of 11131221010 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, ten".