2011111221210 has 256 divisors, whose sum is σ = 6113744953344. Its totient is φ = 411996367872.

The previous prime is 2011111221179. The next prime is 2011111221211. The reversal of 2011111221210 is 121221111102.

It is a happy number.

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 2011111221210.

It is not an unprimeable number, because it can be changed into a prime (2011111221211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 49171429 + ... + 49212311.

It is an arithmetic number, because the mean of its divisors is an integer number (23881816224).

Almost surely, 2^{2011111221210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011111221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3056872476672).

2011111221210 is an abundant number, since it is smaller than the sum of its proper divisors (4102633732134).

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

2011111221210 is a wasteful number, since it uses less digits than its factorization.

2011111221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41437.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2011111221210 its reverse (121221111102), we get a palindrome (2132332332312).

The spelling of 2011111221210 in words is "two trillion, eleven billion, one hundred eleven million, two hundred twenty-one thousand, two hundred ten".