11211221110 has 32 divisors (see below), whose sum is σ = 20525918400. Its totient is φ = 4407768960.

The previous prime is 11211221101. The next prime is 11211221137. The reversal of 11211221110 is 1112211211.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945096 + ... + 956884.

It is an arithmetic number, because the mean of its divisors is an integer number (641434950).

Almost surely, 2^11211221110 is an apocalyptic number.

11211221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11211221110 is a deficient number, since it is larger than the sum of its proper divisors (9314697290).

11211221110 is a wasteful number, since it uses less digits than its factorization.

11211221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13416.

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

Adding to 11211221110 its reverse (1112211211), we get a palindrome (12323432321).

The spelling of 11211221110 in words is "eleven billion, two hundred eleven million, two hundred twenty-one thousand, one hundred ten".