2011222001220 has 24 divisors (see below), whose sum is σ = 5631421603584. Its totient is φ = 536325866976.

The previous prime is 2011222001183. The next prime is 2011222001293. The reversal of 2011222001220 is 221002221102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2011222001220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16760183284 + ... + 16760183403.

It is an arithmetic number, because the mean of its divisors is an integer number (234642566816).

Almost surely, 2^{2011222001220} is an apocalyptic number.

2011222001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011222001220 is an abundant number, since it is smaller than the sum of its proper divisors (3620199602364).

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

2011222001220 is a wasteful number, since it uses less digits than its factorization.

2011222001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33520366699 (or 33520366697 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2011222001220 its reverse (221002221102), we get a palindrome (2232224222322).

The spelling of 2011222001220 in words is "two trillion, eleven billion, two hundred twenty-two million, one thousand, two hundred twenty".