11011221221010 has 64 divisors (see below), whose sum is σ = 26594157389184. Its totient is φ = 2917797811200.

The previous prime is 11011221220927. The next prime is 11011221221023. The reversal of 11011221221010 is 1012212211011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1681197 + ... + 4984863.

It is an arithmetic number, because the mean of its divisors is an integer number (415533709206).

Almost surely, 2^{11011221221010} is an apocalyptic number.

11011221221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11011221221010 is an abundant number, since it is smaller than the sum of its proper divisors (15582936168174).

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

11011221221010 is a wasteful number, since it uses less digits than its factorization.

11011221221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304379.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11011221221010 its reverse (1012212211011), we get a palindrome (12023433432021).

Subtracting from 11011221221010 its reverse (1012212211011), we obtain a palindrome (9999009009999).

The spelling of 11011221221010 in words is "eleven trillion, eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, ten".