11011221210 has 64 divisors (see below), whose sum is σ = 28847871360. Its totient is φ = 2667674880.

The previous prime is 11011221191. The next prime is 11011221229. The reversal of 11011221210 is 1212211011.

It is an interprime number because it is at equal distance from previous prime (11011221191) and next prime (11011221229).

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, 548836 + ... + 568544.

It is an arithmetic number, because the mean of its divisors is an integer number (450747990).

Almost surely, 2^11011221210 is an apocalyptic number.

11011221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11011221210 is an abundant number, since it is smaller than the sum of its proper divisors (17836650150).

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

11011221210 is a wasteful number, since it uses less digits than its factorization.

11011221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21423.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11011221210 its reverse (1212211011), we get a palindrome (12223432221).

It can be divided in two parts, 11011 and 221210, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 11011221210 in words is "eleven billion, eleven million, two hundred twenty-one thousand, two hundred ten".