2211223201020 has 144 divisors (see below), whose sum is σ = 6825502363680. Its totient is φ = 579364032000.

The previous prime is 2211223201009. The next prime is 2211223201043. The reversal of 2211223201020 is 201023221122.

2211223201020 is a `hidden beast` number, since 221 + 1 + 22 + 320 + 102 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2211223200984 and 2211223201002.

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, 1917346 + ... + 2845814.

It is an arithmetic number, because the mean of its divisors is an integer number (47399321970).

Almost surely, 2^{2211223201020} is an apocalyptic number.

2211223201020 is a gapful number since it is divisible by the number (20) 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 2211223201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3412751181840).

2211223201020 is an abundant number, since it is smaller than the sum of its proper divisors (4614279162660).

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

2211223201020 is a wasteful number, since it uses less digits than its factorization.

2211223201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928716 (or 928711 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2211223201020 its reverse (201023221122), we get a palindrome (2412246422142).

The spelling of 2211223201020 in words is "two trillion, two hundred eleven billion, two hundred twenty-three million, two hundred one thousand, twenty".