1101220323840 has 1920 divisors, whose sum is σ = 4979656281600. Its totient is φ = 231760134144.

The previous prime is 1101220323829. The next prime is 1101220323857. The reversal of 1101220323840 is 483230221011.

1101220323840 is a `hidden beast` number, since 110 + 1 + 220 + 323 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2773854522 + ... + 2773854918.

It is an arithmetic number, because the mean of its divisors is an integer number (2593570980).

Almost surely, 2^{1101220323840} is an apocalyptic number.

1101220323840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101220323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2489828140800).

1101220323840 is an abundant number, since it is smaller than the sum of its proper divisors (3878435957760).

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

1101220323840 is an frugal number, since it uses more digits than its factorization.

1101220323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 1101220323840 its reverse (483230221011), we get a palindrome (1584450544851).

The spelling of 1101220323840 in words is "one trillion, one hundred one billion, two hundred twenty million, three hundred twenty-three thousand, eight hundred forty".