11210020020 has 144 divisors (see below), whose sum is σ = 35366403072. Its totient is φ = 2871832320.

The previous prime is 11210019971. The next prime is 11210020033. The reversal of 11210020020 is 2002001211.

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

It is a junction number, because it is equal to n+sod(n) for n = 11210019984 and 11210020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 460269 + ... + 484011.

Almost surely, 2^11210020020 is an apocalyptic number.

11210020020 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 11210020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17683201536).

11210020020 is an abundant number, since it is smaller than the sum of its proper divisors (24156383052).

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

11210020020 is a wasteful number, since it uses less digits than its factorization.

11210020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23862 (or 23857 counting only the distinct ones).

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

Adding to 11210020020 its reverse (2002001211), we get a palindrome (13212021231).

The spelling of 11210020020 in words is "eleven billion, two hundred ten million, twenty thousand, twenty".