1321000110 has 64 divisors (see below), whose sum is σ = 3530640960. Its totient is φ = 351469440.

The previous prime is 1321000081. The next prime is 1321000127. The reversal of 1321000110 is 110001231.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1321000092 and 1321000101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119164 + ... + 129776.

It is an arithmetic number, because the mean of its divisors is an integer number (55166265).

Almost surely, 2^1321000110 is an apocalyptic number.

1321000110 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 1321000110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765320480).

1321000110 is an abundant number, since it is smaller than the sum of its proper divisors (2209640850).

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

1321000110 is a wasteful number, since it uses less digits than its factorization.

1321000110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090 (or 11084 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1321000110 is about 36345.5652040245. The cubic root of 1321000110 is about 1097.2382814515.

Adding to 1321000110 its reverse (110001231), we get a palindrome (1431001341).

The spelling of 1321000110 in words is "one billion, three hundred twenty-one million, one hundred ten", and thus it is an aban number.