1101120020 has 96 divisors (see below), whose sum is σ = 3104752896. Its totient is φ = 316800000.

The previous prime is 1101120019. The next prime is 1101120029. The reversal of 1101120020 is 200211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101120029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7481 + ... + 47520.

It is an arithmetic number, because the mean of its divisors is an integer number (32341176).

Almost surely, 2^1101120020 is an apocalyptic number.

1101120020 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 1101120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552376448).

1101120020 is an abundant number, since it is smaller than the sum of its proper divisors (2003632876).

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

1101120020 is a wasteful number, since it uses less digits than its factorization.

1101120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55041 (or 55039 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1101120020 is about 33183.1285444878. The cubic root of 1101120020 is about 1032.6303524840.

Adding to 1101120020 its reverse (200211011), we get a palindrome (1301331031).

Subtracting from 1101120020 its reverse (200211011), we obtain a palindrome (900909009).

It can be divided in two parts, 1101 and 120020, that added together give a palindrome (121121).

The spelling of 1101120020 in words is "one billion, one hundred one million, one hundred twenty thousand, twenty".