1221122210011 has 96 divisors (see below), whose sum is σ = 1411958830464. Its totient is φ = 1054715904000.

The previous prime is 1221122209997. The next prime is 1221122210059. The reversal of 1221122210011 is 1100122211221.

It is not a de Polignac number, because 1221122210011 - 2⁷ = 1221122209883 is a prime.

It is a super-2 number, since 2×1221122210011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221122210081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8913300735 + ... + 8913300871.

It is an arithmetic number, because the mean of its divisors is an integer number (14707904484).

Almost surely, 2^{1221122210011} is an apocalyptic number.

1221122210011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1221122210011 is a deficient number, since it is larger than the sum of its proper divisors (190836620453).

1221122210011 is a wasteful number, since it uses less digits than its factorization.

1221122210011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221122210011 its reverse (1100122211221), we get a palindrome (2321244421232).

It can be divided in two parts, 12211 and 22210011, that added together give a palindrome (22222222).

The spelling of 1221122210011 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred ten thousand, eleven".