1122121110 has 128 divisors (see below), whose sum is σ = 3001287168. Its totient is φ = 266240000.

The previous prime is 1122121109. The next prime is 1122121111. The reversal of 1122121110 is 111212211.

It is an interprime number because it is at equal distance from previous prime (1122121109) and next prime (1122121111).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122121111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4366102 + ... + 4366358.

It is an arithmetic number, because the mean of its divisors is an integer number (23447556).

Almost surely, 2^1122121110 is an apocalyptic number.

1122121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500643584).

1122121110 is an abundant number, since it is smaller than the sum of its proper divisors (1879166058).

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

1122121110 is a wasteful number, since it uses less digits than its factorization.

1122121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

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

The square root of 1122121110 is about 33498.0762134186. The cubic root of 1122121110 is about 1039.1539933236.

Adding to 1122121110 its reverse (111212211), we get a palindrome (1233333321).

The spelling of 1122121110 in words is "one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred ten".