11211000020220 has 288 divisors, whose sum is σ = 42899716371456. Its totient is φ = 2150361561600.

The previous prime is 11211000020189. The next prime is 11211000020221. The reversal of 11211000020220 is 2202000011211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11211000020196 and 11211000020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211000020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12912676 + ... + 13753515.

It is an arithmetic number, because the mean of its divisors is an integer number (148957348512).

Almost surely, 2^{11211000020220} is an apocalyptic number.

11211000020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211000020220 is an abundant number, since it is smaller than the sum of its proper divisors (31688716351236).

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

11211000020220 is a wasteful number, since it uses less digits than its factorization.

11211000020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26666241 (or 26666232 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11211000020220 its reverse (2202000011211), we get a palindrome (13413000031431).

Subtracting from 11211000020220 its reverse (2202000011211), we obtain a palindrome (9009000009009).

The spelling of 11211000020220 in words is "eleven trillion, two hundred eleven billion, twenty thousand, two hundred twenty".