11020101820 has 48 divisors (see below), whose sum is σ = 28482729408. Its totient is φ = 3487680000.

The previous prime is 11020101769. The next prime is 11020101839. The reversal of 11020101820 is 2810102011.

It is a junction number, because it is equal to n+sod(n) for n = 11020101794 and 11020101803.

It is a congruent number.

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, 3025681 + ... + 3029320.

It is an arithmetic number, because the mean of its divisors is an integer number (593390196).

Almost surely, 2^11020101820 is an apocalyptic number.

11020101820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11020101820 is an abundant number, since it is smaller than the sum of its proper divisors (17462627588).

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

11020101820 is a wasteful number, since it uses less digits than its factorization.

11020101820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055030 (or 6055028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11020101820 its reverse (2810102011), we get a palindrome (13830203831).

The spelling of 11020101820 in words is "eleven billion, twenty million, one hundred one thousand, eight hundred twenty".