11100121221210 has 128 divisors (see below), whose sum is σ = 32691033575424. Its totient is φ = 2354292433920.

The previous prime is 11100121221191. The next prime is 11100121221223. The reversal of 11100121221210 is 1212212100111.

It is a happy number.

It is a super-2 number, since 2×11100121221210² (a number of 27 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11100121221210.

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 63 ways as a sum of consecutive naturals, for example, 21642852 + ... + 22149791.

It is an arithmetic number, because the mean of its divisors is an integer number (255398699808).

Almost surely, 2^{11100121221210} is an apocalyptic number.

11100121221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11100121221210 is an abundant number, since it is smaller than the sum of its proper divisors (21590912354214).

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

11100121221210 is a wasteful number, since it uses less digits than its factorization.

11100121221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43792748.

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

Adding to 11100121221210 its reverse (1212212100111), we get a palindrome (12312333321321).

The spelling of 11100121221210 in words is "eleven trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".