1011222221211 has 48 divisors (see below), whose sum is σ = 1582387123200. Its totient is φ = 620106249024.

The previous prime is 1011222221209. The next prime is 1011222221239. The reversal of 1011222221211 is 1121222221101.

1011222221211 is a `hidden beast` number, since 1 + 0 + 11 + 222 + 221 + 211 = 666.

It is not a de Polignac number, because 1011222221211 - 2¹ = 1011222221209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011222221291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2863800 + ... + 3197466.

It is an arithmetic number, because the mean of its divisors is an integer number (32966398400).

Almost surely, 2^{1011222221211} is an apocalyptic number.

1011222221211 is a deficient number, since it is larger than the sum of its proper divisors (571164901989).

1011222221211 is a wasteful number, since it uses less digits than its factorization.

1011222221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334208 (or 334205 counting only the distinct ones).

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

Adding to 1011222221211 its reverse (1121222221101), we get a palindrome (2132444442312).

It can be divided in two parts, 1011 and 222221211, that added together give a palindrome (222222222).

The spelling of 1011222221211 in words is "one trillion, eleven billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred eleven".