2211121110 has 128 divisors (see below), whose sum is σ = 6073657344. Its totient is φ = 510312960.

The previous prime is 2211121109. The next prime is 2211121127. The reversal of 2211121110 is 111211122.

2211121110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 571944 + ... + 575796.

It is an arithmetic number, because the mean of its divisors is an integer number (47450448).

Almost surely, 2^2211121110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3036828672).

2211121110 is an abundant number, since it is smaller than the sum of its proper divisors (3862536234).

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

2211121110 is a wasteful number, since it uses less digits than its factorization.

2211121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2211121110 is about 47022.5595857988. The cubic root of 2211121110 is about 1302.7792827068.

Adding to 2211121110 its reverse (111211122), we get a palindrome (2322332232).

It can be divided in two parts, 221112 and 1110, that added together give a palindrome (222222).

The spelling of 2211121110 in words is "two billion, two hundred eleven million, one hundred twenty-one thousand, one hundred ten".