11121212112210 has 48 divisors (see below), whose sum is σ = 29696642081496. Its totient is φ = 2885503682304.

The previous prime is 11121212112119. The next prime is 11121212112293. The reversal of 11121212112210 is 1221121212111.

It is a happy number.

11121212112210 is a `hidden beast` number, since 1 + 112 + 121 + 211 + 221 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10913951355129 + 207260757081 = 3303627^2 + 455259^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1669848339 + ... + 1669854998.

Almost surely, 2^{11121212112210} is an apocalyptic number.

11121212112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11121212112210 is an abundant number, since it is smaller than the sum of its proper divisors (18575429969286).

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

11121212112210 is a wasteful number, since it uses less digits than its factorization.

11121212112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339703387 (or 3339703384 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11121212112210 its reverse (1221121212111), we get a palindrome (12342333324321).

Subtracting from 11121212112210 its reverse (1221121212111), we obtain a palindrome (9900090900099).

The spelling of 11121212112210 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, two hundred ten".