1021222112211 has 64 divisors (see below), whose sum is σ = 1785338634240. Its totient is φ = 564569948160.

The previous prime is 1021222112191. The next prime is 1021222112227. The reversal of 1021222112211 is 1122112221201.

1021222112211 is a `hidden beast` number, since 10 + 212 + 221 + 1 + 221 + 1 = 666.

It is not a de Polignac number, because 1021222112211 - 2⁵ = 1021222112179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021222012211) 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 63 ways as a sum of consecutive naturals, for example, 22200211 + ... + 22246163.

It is an arithmetic number, because the mean of its divisors is an integer number (27895916160).

Almost surely, 2^{1021222112211} is an apocalyptic number.

1021222112211 is a deficient number, since it is larger than the sum of its proper divisors (764116522029).

1021222112211 is a wasteful number, since it uses less digits than its factorization.

1021222112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49793 (or 49787 counting only the distinct ones).

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

Adding to 1021222112211 its reverse (1122112221201), we get a palindrome (2143334333412).

The spelling of 1021222112211 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred eleven".