1101012120 has 192 divisors, whose sum is σ = 3978374400. Its totient is φ = 262241280.

The previous prime is 1101012109. The next prime is 1101012127. The reversal of 1101012120 is 212101011.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101012127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141286 + ... + 148874.

It is an arithmetic number, because the mean of its divisors is an integer number (20720700).

Almost surely, 2^1101012120 is an apocalyptic number.

1101012120 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 1101012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1989187200).

1101012120 is an abundant number, since it is smaller than the sum of its proper divisors (2877362280).

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

1101012120 is a wasteful number, since it uses less digits than its factorization.

1101012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650 (or 7643 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1101012120 is about 33181.5026784502. The cubic root of 1101012120 is about 1032.5966218423.

Adding to 1101012120 its reverse (212101011), we get a palindrome (1313113131).

The spelling of 1101012120 in words is "one billion, one hundred one million, twelve thousand, one hundred twenty".