11011211020 has 24 divisors (see below), whose sum is σ = 23251305168. Its totient is φ = 4380148800.

The previous prime is 11011210963. The next prime is 11011211021. The reversal of 11011211020 is 2011211011.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11011210988 and 11011211006.

It is not an unprimeable number, because it can be changed into a prime (11011211021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1517266 + ... + 1524505.

It is an arithmetic number, because the mean of its divisors is an integer number (968804382).

Almost surely, 2^11011211020 is an apocalyptic number.

11011211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011211020 is an abundant number, since it is smaller than the sum of its proper divisors (12240094148).

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

11011211020 is a wasteful number, since it uses less digits than its factorization.

11011211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041961 (or 3041959 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11011211020 its reverse (2011211011), we get a palindrome (13022422031).

Subtracting from 11011211020 its reverse (2011211011), we obtain a palindrome (9000000009).

It can be divided in two parts, 1101 and 1211020, that added together give a palindrome (1212121).

The spelling of 11011211020 in words is "eleven billion, eleven million, two hundred eleven thousand, twenty".