1101210120 has 64 divisors (see below), whose sum is σ = 3670704000. Its totient is φ = 293655744.

The previous prime is 1101210109. The next prime is 1101210137. The reversal of 1101210120 is 210121011.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508740 + ... + 510899.

It is an arithmetic number, because the mean of its divisors is an integer number (57354750).

Almost surely, 2^1101210120 is an apocalyptic number.

1101210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101210120 is an abundant number, since it is smaller than the sum of its proper divisors (2569493880).

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

1101210120 is a wasteful number, since it uses less digits than its factorization.

1101210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019659 (or 1019649 counting only the distinct ones).

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

The square root of 1101210120 is about 33184.4861343369. The cubic root of 1101210120 is about 1032.6585169757.

Adding to 1101210120 its reverse (210121011), we get a palindrome (1311331131).

The spelling of 1101210120 in words is "one billion, one hundred one million, two hundred ten thousand, one hundred twenty".