2011222201212 has 96 divisors (see below), whose sum is σ = 5963753241600. Its totient is φ = 574193624256.

The previous prime is 2011222201211. The next prime is 2011222201223. The reversal of 2011222201212 is 2121022221102.

It is a happy number.

2011222201212 is a `hidden beast` number, since 20 + 11 + 222 + 201 + 212 = 666.

It is a super-2 number, since 2×2011222201212² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011222201211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35787 + ... + 2005922.

It is an arithmetic number, because the mean of its divisors is an integer number (62122429600).

Almost surely, 2^{2011222201212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011222201212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2981876620800).

2011222201212 is an abundant number, since it is smaller than the sum of its proper divisors (3952531040388).

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

2011222201212 is a wasteful number, since it uses less digits than its factorization.

2011222201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043032 (or 2043024 counting only the distinct ones).

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

Adding to 2011222201212 its reverse (2121022221102), we get a palindrome (4132244422314).

The spelling of 2011222201212 in words is "two trillion, eleven billion, two hundred twenty-two million, two hundred one thousand, two hundred twelve".