2011212221022 has 24 divisors (see below), whose sum is σ = 4376655424440. Its totient is φ = 667476543600.

The previous prime is 2011212221021. The next prime is 2011212221093. The reversal of 2011212221022 is 2201222121102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2011212220986 and 2011212221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011212221021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243956604 + ... + 243964847.

It is an arithmetic number, because the mean of its divisors is an integer number (182360642685).

Almost surely, 2^{2011212221022} is an apocalyptic number.

2011212221022 is an abundant number, since it is smaller than the sum of its proper divisors (2365443203418).

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

2011212221022 is a wasteful number, since it uses less digits than its factorization.

2011212221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487921688 (or 487921685 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2011212221022 its reverse (2201222121102), we get a palindrome (4212434342124).

The spelling of 2011212221022 in words is "two trillion, eleven billion, two hundred twelve million, two hundred twenty-one thousand, twenty-two".