11111010121210 has 8 divisors (see below), whose sum is σ = 19999818218196. Its totient is φ = 4444404048480.

The previous prime is 11111010121193. The next prime is 11111010121213. The reversal of 11111010121210 is 1212101011111.

It can be written as a sum of positive squares in 2 ways, for example, as 9198063874561 + 1912946246649 = 3032831^2 + 1383093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11111010121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555550506051 + ... + 555550506070.

Almost surely, 2^{11111010121210} is an apocalyptic number.

11111010121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111010121210 is a deficient number, since it is larger than the sum of its proper divisors (8888808096986).

11111010121210 is a wasteful number, since it uses less digits than its factorization.

11111010121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111101012128.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11111010121210 its reverse (1212101011111), we get a palindrome (12323111132321).

The spelling of 11111010121210 in words is "eleven trillion, one hundred eleven billion, ten million, one hundred twenty-one thousand, two hundred ten".