201111212022 has 64 divisors (see below), whose sum is σ = 469286784000. Its totient is φ = 56270712960.

The previous prime is 201111212021. The next prime is 201111212051. The reversal of 201111212022 is 220212111102.

It is a junction number, because it is equal to n+sod(n) for n = 201111211992 and 201111212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111212021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218004 + ... + 670632.

It is an arithmetic number, because the mean of its divisors is an integer number (7332606000).

Almost surely, 2^201111212022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201111212022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234643392000).

201111212022 is an abundant number, since it is smaller than the sum of its proper divisors (268175571978).

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

201111212022 is a wasteful number, since it uses less digits than its factorization.

201111212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452861.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201111212022 its reverse (220212111102), we get a palindrome (421323323124).

The spelling of 201111212022 in words is "two hundred one billion, one hundred eleven million, two hundred twelve thousand, twenty-two".