2011221201020 has 12 divisors (see below), whose sum is σ = 4223564522184. Its totient is φ = 804488480400.

The previous prime is 2011221201013. The next prime is 2011221201071. The reversal of 2011221201020 is 201021221102.

It is a junction number, because it is equal to n+sod(n) for n = 2011221200986 and 2011221201004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50280530006 + ... + 50280530045.

It is an arithmetic number, because the mean of its divisors is an integer number (351963710182).

Almost surely, 2^{2011221201020} is an apocalyptic number.

2011221201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011221201020 is an abundant number, since it is smaller than the sum of its proper divisors (2212343321164).

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

2011221201020 is a wasteful number, since it uses less digits than its factorization.

2011221201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100561060060 (or 100561060058 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2011221201020 its reverse (201021221102), we get a palindrome (2212242422122).

The spelling of 2011221201020 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred one thousand, twenty".