2011221012220 has 36 divisors (see below), whose sum is σ = 4913125617960. Its totient is φ = 689561489568.

The previous prime is 2011221012187. The next prime is 2011221012259. The reversal of 2011221012220 is 222101221102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2011221012194 and 2011221012203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1026132190 + ... + 1026134149.

It is an arithmetic number, because the mean of its divisors is an integer number (136475711610).

Almost surely, 2^{2011221012220} is an apocalyptic number.

2011221012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011221012220 is an abundant number, since it is smaller than the sum of its proper divisors (2901904605740).

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

2011221012220 is a wasteful number, since it uses less digits than its factorization.

2011221012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052266362 (or 2052266353 counting only the distinct ones).

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

Adding to 2011221012220 its reverse (222101221102), we get a palindrome (2233322233322).

The spelling of 2011221012220 in words is "two trillion, eleven billion, two hundred twenty-one million, twelve thousand, two hundred twenty".