2011221222220 has 48 divisors (see below), whose sum is σ = 4827308790528. Its totient is φ = 689507582400.

The previous prime is 2011221222217. The next prime is 2011221222271. The reversal of 2011221222220 is 222221221102.

It is a super-2 number, since 2×2011221222220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253395 + ... + 2365045.

It is an arithmetic number, because the mean of its divisors is an integer number (100568933136).

Almost surely, 2^{2011221222220} is an apocalyptic number.

2011221222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011221222220 is an abundant number, since it is smaller than the sum of its proper divisors (2816087568308).

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

2011221222220 is a wasteful number, since it uses less digits than its factorization.

2011221222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124590 (or 1124588 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2011221222220 its reverse (222221221102), we get a palindrome (2233442443322).

It can be divided in two parts, 2011221 and 222220, that added together give a triangular number (2233441 = T₂₁₁₃).

The spelling of 2011221222220 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".