2211111021222 has 64 divisors (see below), whose sum is σ = 4942034173440. Its totient is φ = 732777854688.

The previous prime is 2211111021209. The next prime is 2211111021271. The reversal of 2211111021222 is 2221201111122.

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 = 2211111021195 and 2211111021204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8787508 + ... + 9035624.

It is an arithmetic number, because the mean of its divisors is an integer number (77219283960).

Almost surely, 2^{2211111021222} is an apocalyptic number.

2211111021222 is an abundant number, since it is smaller than the sum of its proper divisors (2730923152218).

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

2211111021222 is a wasteful number, since it uses less digits than its factorization.

2211111021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249082 (or 249076 counting only the distinct ones).

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

Adding to 2211111021222 its reverse (2221201111122), we get a palindrome (4432312132344).

The spelling of 2211111021222 in words is "two trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, two hundred twenty-two".