2111021211222 has 640 divisors, whose sum is σ = 6357970206720. Its totient is φ = 507034080000.

The previous prime is 2111021211199. The next prime is 2111021211227. The reversal of 2111021211222 is 2221121201112.

2111021211222 is a `hidden beast` number, since 211 + 1 + 0 + 21 + 211 + 222 = 666.

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 = 2111021211195 and 2111021211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111021211227) 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 319 ways as a sum of consecutive naturals, for example, 2183061783 + ... + 2183062749.

It is an arithmetic number, because the mean of its divisors is an integer number (9934328448).

Almost surely, 2^{2111021211222} is an apocalyptic number.

2111021211222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111021211222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3178985103360).

2111021211222 is an abundant number, since it is smaller than the sum of its proper divisors (4246948995498).

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

2111021211222 is a wasteful number, since it uses less digits than its factorization.

2111021211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2111021211222 its reverse (2221121201112), we get a palindrome (4332142412334).

The spelling of 2111021211222 in words is "two trillion, one hundred eleven billion, twenty-one million, two hundred eleven thousand, two hundred twenty-two".