11020002120 has 96 divisors (see below), whose sum is σ = 35971673400. Its totient is φ = 2925812736.

The previous prime is 11020002113. The next prime is 11020002137. The reversal of 11020002120 is 2120002011.

It can be written as a sum of positive squares in 4 ways, for example, as 9505080036 + 1514922084 = 97494^2 + 38922^2 .

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 23 ways as a sum of consecutive naturals, for example, 15604 + ... + 149276.

Almost surely, 2^11020002120 is an apocalyptic number.

11020002120 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 11020002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17985836700).

11020002120 is an abundant number, since it is smaller than the sum of its proper divisors (24951671280).

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

11020002120 is a wasteful number, since it uses less digits than its factorization.

11020002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133919 (or 133912 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11020002120 its reverse (2120002011), we get a palindrome (13140004131).

The spelling of 11020002120 in words is "eleven billion, twenty million, two thousand, one hundred twenty".