1222111011 has 48 divisors (see below), whose sum is σ = 1962122400. Its totient is φ = 672967680.

The previous prime is 1222110997. The next prime is 1222111019. The reversal of 1222111011 is 1101112221.

It is not a de Polignac number, because 1222111011 - 2⁶ = 1222110947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222111019) 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, 175545 + ... + 182373.

It is an arithmetic number, because the mean of its divisors is an integer number (40877550).

Almost surely, 2^1222111011 is an apocalyptic number.

1222111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222111011 is a deficient number, since it is larger than the sum of its proper divisors (740011389).

1222111011 is a wasteful number, since it uses less digits than its factorization.

1222111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900 (or 6889 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1222111011 is about 34958.7043667239. The cubic root of 1222111011 is about 1069.1456804865.

Adding to 1222111011 its reverse (1101112221), we get a palindrome (2323223232).

It can be divided in two parts, 122211 and 1011, that multiplied together give a palindrome (123555321).

The spelling of 1222111011 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, eleven".