1311022231110 has 128 divisors (see below), whose sum is σ = 3661528043520. Its totient is φ = 333171273600.

The previous prime is 1311022231069. The next prime is 1311022231151. The reversal of 1311022231110 is 111322201131.

1311022231110 is a `hidden beast` number, since 13 + 110 + 222 + 311 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (1311022231069) and next prime (1311022231151).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 1293400 + ... + 2072420.

It is an arithmetic number, because the mean of its divisors is an integer number (28605687840).

Almost surely, 2^{1311022231110} is an apocalyptic number.

1311022231110 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 1311022231110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830764021760).

1311022231110 is an abundant number, since it is smaller than the sum of its proper divisors (2350505812410).

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

1311022231110 is a wasteful number, since it uses less digits than its factorization.

1311022231110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779331 (or 779325 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1311022231110 its reverse (111322201131), we get a palindrome (1422344432241).

The spelling of 1311022231110 in words is "one trillion, three hundred eleven billion, twenty-two million, two hundred thirty-one thousand, one hundred ten".