2111221221222 has 64 divisors (see below), whose sum is σ = 4482619674624. Its totient is φ = 661719611520.

The previous prime is 2111221221203. The next prime is 2111221221269. The reversal of 2111221221222 is 2221221221112.

It is a super-2 number, since 2×2111221221222² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 4792228 + ... + 5214200.

It is an arithmetic number, because the mean of its divisors is an integer number (70040932416).

Almost surely, 2^{2111221221222} is an apocalyptic number.

2111221221222 is an abundant number, since it is smaller than the sum of its proper divisors (2371398453402).

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

2111221221222 is a wasteful number, since it uses less digits than its factorization.

2111221221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422773.

The product of its digits is 256, while the sum is 21.

Adding to 2111221221222 its reverse (2221221221112), we get a palindrome (4332442442334).

The spelling of 2111221221222 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".