1101273120 has 288 divisors, whose sum is σ = 4022089344. Its totient is φ = 273715200.

The previous prime is 1101273113. The next prime is 1101273139. The reversal of 1101273120 is 213721011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a junction number, because it is equal to n+sod(n) for n = 1101273093 and 1101273102.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1357515 + ... + 1358325.

It is an arithmetic number, because the mean of its divisors is an integer number (13965588).

Almost surely, 2^1101273120 is an apocalyptic number.

1101273120 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 1101273120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011044672).

1101273120 is an abundant number, since it is smaller than the sum of its proper divisors (2920816224).

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

1101273120 is a wasteful number, since it uses less digits than its factorization.

1101273120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 1101273120 is about 33185.4353595067. The cubic root of 1101273120 is about 1032.6782093259.

Adding to 1101273120 its reverse (213721011), we get a palindrome (1314994131).

The spelling of 1101273120 in words is "one billion, one hundred one million, two hundred seventy-three thousand, one hundred twenty".