1121321110 has 32 divisors (see below), whose sum is σ = 2484159552. Its totient is φ = 354879360.

The previous prime is 1121321101. The next prime is 1121321111. The reversal of 1121321110 is 111231211.

It is a happy number.

It is a super-2 number, since 2×1121321110² = 2514722063463264200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121321111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615201 + ... + 617020.

It is an arithmetic number, because the mean of its divisors is an integer number (77629986).

Almost surely, 2^1121321110 is an apocalyptic number.

1121321110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121321110 is an abundant number, since it is smaller than the sum of its proper divisors (1362838442).

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

1121321110 is a wasteful number, since it uses less digits than its factorization.

1121321110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232248.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1121321110 is about 33486.1331001356. The cubic root of 1121321110 is about 1038.9069846821.

Adding to 1121321110 its reverse (111231211), we get a palindrome (1232552321).

It can be divided in two parts, 11213 and 21110, that added together give a palindrome (32323).

The spelling of 1121321110 in words is "one billion, one hundred twenty-one million, three hundred twenty-one thousand, one hundred ten".