212211021222112 has 96 divisors (see below), whose sum is σ = 459147865042944. Its totient is φ = 95747231193600.

The previous prime is 212211021222089. The next prime is 212211021222133. The reversal of 212211021222112 is 211222120112212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26337073 + ... + 33437455.

It is an arithmetic number, because the mean of its divisors is an integer number (4782790260864).

Almost surely, 2^{212211021222112} is an apocalyptic number.

212211021222112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212211021222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229573932521472).

212211021222112 is an abundant number, since it is smaller than the sum of its proper divisors (246936843820832).

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

212211021222112 is a wasteful number, since it uses less digits than its factorization.

212211021222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101032 (or 7101024 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212211021222112 its reverse (211222120112212), we get a palindrome (423433141334324).

The spelling of 212211021222112 in words is "two hundred twelve trillion, two hundred eleven billion, twenty-one million, two hundred twenty-two thousand, one hundred twelve".