11111212210 has 16 divisors (see below), whose sum is σ = 22857350976. Its totient is φ = 3809558448.

The previous prime is 11111212201. The next prime is 11111212213. The reversal of 11111212210 is 1221211111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11111212213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79365732 + ... + 79365871.

It is an arithmetic number, because the mean of its divisors is an integer number (1428584436).

Almost surely, 2^11111212210 is an apocalyptic number.

11111212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111212210 is an abundant number, since it is smaller than the sum of its proper divisors (11746138766).

11111212210 is a wasteful number, since it uses less digits than its factorization.

11111212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158731617.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111212210 its reverse (1221211111), we get a palindrome (12332423321).

The spelling of 11111212210 in words is "eleven billion, one hundred eleven million, two hundred twelve thousand, two hundred ten".