2011121222020 has 12 divisors (see below), whose sum is σ = 4223354566284. Its totient is φ = 804448488800.

The previous prime is 2011121222003. The next prime is 2011121222029. The reversal of 2011121222020 is 202221211102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 878310101124 + 1132811120896 = 937182^2 + 1064336^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2011121221985 and 2011121222003.

It is not an unprimeable number, because it can be changed into a prime (2011121222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50278030531 + ... + 50278030570.

It is an arithmetic number, because the mean of its divisors is an integer number (351946213857).

Almost surely, 2^{2011121222020} is an apocalyptic number.

2011121222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011121222020 is an abundant number, since it is smaller than the sum of its proper divisors (2212233344264).

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

2011121222020 is a wasteful number, since it uses less digits than its factorization.

2011121222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100556061110 (or 100556061108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2011121222020 its reverse (202221211102), we get a palindrome (2213342433122).

The spelling of 2011121222020 in words is "two trillion, eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".